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Kiwiland Education

Converting Fractions Decimals and Percentages | Mystery Detective Worksheets | Grades 6–7

$4.50 USD

Converting fractions, decimals and percentages activities, converting decimals to fractions and fractions to decimals worksheets, and rational number practice for 6th grade and 7th grade are all included in this Mini Mystery Detective. Students rewrite one number in another form to crack seven detective cases - perfect for math centers, morning work, early finishers, substitute days, homework, spiral review and test prep. Completely no prep - just print and go.

What's Inside

  • Converting decimals to percentages by moving the point two places: 0.83 becomes 83% and 0.975 becomes 97.5%
  • Converting percentages to decimals by moving it back the other way: 62.5% becomes 0.625 and 3% becomes 0.03
  • Converting fractions to percentages by scaling up to hundredths: 13/20 becomes 65% and 9/25 becomes 36%
  • Converting fractions to decimals by dividing: 29/40 becomes 0.725 and 7/8 becomes 0.875
  • Converting percentages to fractions in simplest form: 44% becomes 11/25 and 12.5% becomes 1/8
  • Converting decimals to fractions in simplest form: 0.325 becomes 13/40 and 0.06 becomes 3/50
  • Reducing every fraction answer to simplest form, the step students skip most often
  • A final mixed case that jumps between all six conversions with no warning, so students have to decide which move to make
  • Logical reasoning and deductive elimination as students rule each suspect out
  • Self-checking answer keys for every case

Seven market-day cases to crack: the till roll, the discount signs, the price tags, the recipe cards, the sale posters, the scale readings, and the market ledger. Answer keys included for every case.

What is a Mini Mystery Detective?

A no-prep detective activity where students solve math problems to cross off suspects and unmask the culprit.

When to Use This Resource

  • Math centers and rotations
  • Morning work and bell ringers
  • Early finishers
  • Substitute and relief days
  • Homework
  • Spiral review and test prep
  • Small-group intervention
  • Whole-class warm-ups
  • Percentages and rational number unit review

Grade Levels

Designed for 6th and 7th graders, with converting between fractions, decimals and percentages at its core. Also beneficial for 8th graders who need a refresher before percentages, ratios and proportional relationships, and advanced 5th graders ready for a challenge.

Why Teachers Love Mystery Detectives

  • Zero prep - just print and hand out
  • Self-checking - a conversion done the wrong way round matches no suspect at all, so students catch their own mistakes instead of waiting to be marked
  • Highly engaging - the detective hook pulls in reluctant and struggling learners
  • Builds real conversion fluency alongside logical reasoning
  • Seven separate one-page cases make it easy to differentiate, or to stretch one skill a day across a week
  • Works for the whole class, from struggling to advanced

Love this resource?

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All of our products are digital downloads — no physical items will be shipped.

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Due to the nature of digital products, all sales are final.

We do not offer refunds or exchanges once a file has been downloaded.

However, if you encounter any problems with your download or the product itself, please reach out — we're happy to assist.

  • Thank you from Kiwiland Education

How Math Mysteries Work

Each Math Mystery resource gives you five one-page cases that turn math practice into a clue-based investigation. Here's exactly how a case plays out.

CASE FILE 5 MYSTERIES

Every set is a ready-to-solve investigation

Students become the math detective. They read a story, crunch the numbers, and use their answers as evidence to rule out suspects — until only the culprit is left standing.

1
STEP 01

Read the Case

Each mystery opens with a short, themed story that sets the scene and tells students exactly what they're trying to find out — who took something, what went missing, or what really happened.

Hooks them in seconds
2
STEP 02

Solve the Problems

Students work through a set of problems built around the target skill. Every answer is a clue — so there's a real reason to get each one right.

Focused skill practice
3
STEP 03

Eliminate Suspects

Students match their answers against the suspect list and cross off names one clue at a time. Wrong math means the wrong suspect — so the activity self-checks as they go.

Self-checking built in
4
STEP 04

Crack the Case

One suspect is left — and students reveal who did it. The payoff makes review feel like a win, and they're ready to start the next case.

The satisfying reveal

See it in action

SOLVE A CLUEAnswer = 576
→
MATCH THE ANSWER576 = Bianca
→
CROSS OFFBianca
No apps. No logins. No prep. Just print, hand out, and let them investigate.

New to the format? Read What Is a Math Mystery? for how they work and how to run one in class.

Why Teachers Use Math Mysteries

Skill practice that feels like a case worth solving — and a download that quietly does a lot of your planning for you.

5one-page cases per set
0prep or setup time
color & black-and-white
answer keys included

Five Mysteries in One

Every download includes five separate one-page cases — enough for a full week of practice, a center rotation, or a sub-day backup that's always ready to go.

Truly No-Prep

No cutting, laminating, apps, or logins. Print in full color or black-and-white and hand them straight out — that's the whole setup.

Self-Checking by Design

Students need the right answers to rule out the right suspects, so accuracy matters — and the included answer keys mean no grading for you.

Fits Any Routine

Use one case as a morning warm-up, or spread the five across the week for centers, partner work, early finishers, or intervention.

Keeps Students Hooked

The mystery format gives even reluctant mathematicians a reason to keep solving. Review starts to feel like a game, not another worksheet.

Differentiation-Friendly

Great for on-level practice, an extension for advanced students, or a targeted review pass for anyone who needs another go at the skill.

NO PREP PRINT & GO ANSWER KEYS INCLUDED

What's in every Math Mystery set

5 full-color mysteries 5 black-and-white versions 5 complete answer keys Print-and-go teacher page Bonus coloring page
Practice that feels like a case worth cracking.

Frequently Asked Questions About Math Mysteries

Printable Math Mystery worksheets that turn math practice into clue-based detective investigations.

Is this Math Mystery a digital activity?

No. This is a printable PDF resource. Students complete the Math Mystery on paper. No physical item will be shipped.

Do students need apps, locks, passwords, or logins?

No. Students do not need apps, locks, passwords, or logins. Teachers can print the pages and use the Math Mystery straight away.

How do students solve the Math Mystery?

Each resource includes five one-page cases. In each one, students solve the math problems and use their answers to eliminate suspects until only one remains and the case is cracked.

Can this Math Mystery be used for sub plans?

Yes. Math Mysteries work well for sub plans because students can work through the clues independently, with a partner, or in small groups.

Can this Math Mystery be used for homeschool?

Yes. This printable Math Mystery can be used for homeschool lessons, tutoring, review practice, enrichment, or extra math support.

Will this work for early finishers or math centers?

Yes. Math Mysteries are a good fit for early finishers, math centers, small groups, independent work, review lessons, and extra practice activities.



Converting fractions decimals and percentages mystery detective worksheets grade 6

Converting Fractions Decimals and Percentages | Mystery Detective Worksheets | Grades 6–7

$4.50

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