About this worksheet

This free Year 7 percentage of a quantity worksheet is written for the Western Australian curriculum and mapped to SCSA content description WA7MNAC2. It targets one skill so students can practise until it sticks: by the end, students can say “I can find a percentage of a quantity mentally, with jottings or with a calculator, and use it to solve problems.”

What’s inside

• Key idea box – a short explanation with worked examples to read before starting.
• A · Fluency (16 questions) – quick practice to build accuracy.
• B · Core (10 questions) – worded problems set in everyday Australian contexts.
• C · Reasoning (4 questions) – explain, justify and spot the error.
• D · Challenge (4 questions) – harder multi-step and problem-solving questions for students ready to stretch.
• Separate marking key – every answer with working, plus mark allocations and marking criteria for reasoning questions.

Skills covered

• Finding percentages of quantities using 10%, 5% and 1%
• Solving discount, GST, tip and interest problems
• Using a calculator for harder percentages

How to use this worksheet

Start with the Key idea box, then complete Section A without a calculator. Most students should attempt Sections B and C; Section D suits students aiming for the top of the class or preparing for accelerated or extension maths. The worksheet is marked out of 58, and the score box on the last page helps students see which section needs more practice.

Common mistakes to watch for

• Believing two 50% discounts make an item free
• Taking a second percentage from the original amount
• Misplacing the decimal point with 1% and 0.5%
• Forgetting to subtract the discount

Where this fits in the WA Year 7 sequence

Finding a Percentage of a Quantity sits in the Calculating with number sub-strand of Number and algebra. It is one of a set of short, single-skill EduLift worksheets that split each Year 7 content description into sub-skills. Use the previous and next links to work through the sequence in order.

Common errors we see in tutoring

• Believing two 50% discounts make an item free
• Taking a second percentage from the original amount
• Misplacing the decimal point with 1% and 0.5%
• Forgetting to subtract the discount