Grade 7 · Year 8 · Class 7 · ages 12–13 · Percentages
Percentage increase and decrease: Grade 7 practice
Increasing or decreasing an amount by a percentage. Eight questions at a time, instant feedback and a mastery score from 0 to 100.
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Right answers raise your mastery score (more on harder questions) and wrong ones lower it a little. Your best score is saved on this device, and in your account if you log in.
The idea in one minute
To increase by 20%, multiply by 1.2. To decrease by 20%, multiply by 0.8.
Try these on paper first
One question at each level. Tap a question to see the answer.
Easy Decrease 180 by 10%:
Answer: 162
Medium Decrease 340 by 10%:
Answer: 306
Challenge Increase 780 by 45%:
Answer: 1131
More ways to practise percentage increase and decrease
- Printable percentage increase and decrease worksheet with an answer key (new questions every time)
- Percentages: an interactive lesson on the idea behind it
- All Grade 7 practice · Percentage worksheets
Related skills
- Profit and loss (Grade 7)
- Simple interest (Grade 7)
- Discounts word problems (Grade 7)
- Compound interest for 2 years (Grade 8)
Take a break
Play a game that builds the same skills
FAQ
Percentage increase and decrease: questions
What grade is percentage increase and decrease?
It is usually taught in Grade 7 (Year 8 in England, Class 7 in India, ages 12–13), though schools and countries differ. Try the grade above or below if it feels too hard or too easy.
What does a percentage increase and decrease question look like?
For example: "Decrease 340 by 10%:" The answer is 306. To increase by 20%, multiply by 1.2. To decrease by 20%, multiply by 0.8.
What should I learn before and after percentage increase and decrease?
Before it, try percentages word problems (Grade 5). After it, move on to profit and loss (Grade 7).
How can I get better at percentage increase and decrease?
To increase by 20%, multiply by 1.2. To decrease by 20%, multiply by 0.8. Practise a little every day, read the hint after each wrong answer, and use the printable worksheet when you want to write it out.
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