Decrease an amount by a percentage
7th grade (Year 8 in England) · 16 questions · Common Core: 7.RP.A.3 · England: KS3 Number, GCSE Foundation Ratio
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Date
Score/ 16
Question 1
A household used 1400 kWh of electricity last year. This year it cut its use by 8%. How many kWh did it use this year?
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Question 2
Hana says that to decrease 230 by 40% you multiply by 0.4. Find the correct result of decreasing 230 by 40%.
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Question 3
Decrease 180 by 25%.
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Question 4
A household used 850 kWh of electricity last year. This year it cut its use by 8%. How many kWh did it use this year?
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Question 5
Diego says that to decrease 220 by 30% you multiply by 0.3. Find the correct result of decreasing 220 by 30%.
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Question 6
Decrease 480 by 25%.
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Question 7
A household used 1750 kWh of electricity last year. This year it cut its use by 12%. How many kWh did it use this year?
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Question 8
Aisha says that to decrease 300 by 40% you multiply by 0.4. Find the correct result of decreasing 300 by 40%.
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Question 9
Decrease 260 by 10%.
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Question 10
A household used 1700 kWh of electricity last year. This year it cut its use by 8%. How many kWh did it use this year?
Answer
Question 11
Ana says that to decrease 240 by 40% you multiply by 0.4. Find the correct result of decreasing 240 by 40%.
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Question 12
Decrease 620 by 5%.
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Question 13
A household used 2600 kWh of electricity last year. This year it cut its use by 12%. How many kWh did it use this year?
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Question 14
Hiro says that to decrease 100 by 20% you multiply by 0.2. Find the correct result of decreasing 100 by 20%.
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Question 15
Decrease 640 by 25%.
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Question 16
A household used 1200 kWh of electricity last year. This year it cut its use by 35%. How many kWh did it use this year?
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