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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 110 · 40 questions
TalentJR

The method (Start value is 100%): New value after a rise of p%: value + p% of value. After a fall: value − p% of value. Percent change = change ÷ starting value × 100. Two changes a% and b% one after the other: a + b + (a × b) ÷ 100, with a fall counted as minus.

NameDateTime takenScore ___ / 40
  1. 1.The price of a school bag changes from ₹820 to ₹410. By what percent did it come down?
  2. 2.A water tank holds 2340 litres. 10% of the water is used. How many litres are left?
  3. 3.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  4. 4.The price of a bicycle is ₹440. It goes up by 10%. What is the new price (in ₹)?
  5. 5.A price comes down by 40% and then comes down by 50% more. By what percent has it come down in all? =
  6. 6.A town has 540 people. Its population grows by 40%. How many people live there now?
  7. 7.The price of a school bag changes from ₹3740 to ₹3366. By what percent did it come down?
  8. 8.The price of a bicycle is ₹4520. It goes up by 25%. What is the new price (in ₹)?
  9. 9.A price goes up by 20% and then goes up by 50% more. By what percent has it gone up in all? =
  10. 10.A town has 4480 people. Its population grows by 20%. How many people live there now?
  11. 11.The price of a bicycle is ₹980. It goes up by 40%. What is the new price (in ₹)?
  12. 12.The price of a school bag changes from ₹740 to ₹814. By what percent did it go up?
  13. 13.A water tank holds 4800 litres. 25% of the water is used. How many litres are left?
  14. 14.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  15. 15.A town has 960 people. Its population grows by 50%. How many people live there now?
  16. 16.A price goes up by 50% and then comes down by 25%. By what percent has it gone up in all? =
  17. 17.A shop sells 3700 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  18. 18.A water tank holds 3800 litres. 5% of the water is used. How many litres are left?
  19. 19.A water tank holds 1480 litres. 40% of the water is used. How many litres are left?
  20. 20.A shop sells 4360 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  21. 21.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
  22. 22.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  23. 23.A shop sells 3980 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  24. 24.A town has 1180 people. Its population grows by 10%. How many people live there now?
  25. 25.A water tank holds 3600 litres. 40% of the water is used. How many litres are left?
  26. 26.A water tank holds 2280 litres. 10% of the water is used. How many litres are left?
  27. 27.The price of a school bag changes from ₹1400 to ₹1470. By what percent did it go up?
  28. 28.The price of a school bag changes from ₹1780 to ₹2047. By what percent did it go up?
  29. 29.A water tank holds 760 litres. 40% of the water is used. How many litres are left?
  30. 30.The price of a bicycle is ₹120. It goes up by 25%. What is the new price (in ₹)?
  31. 31.A water tank holds 3240 litres. 5% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹2340 to ₹2574. By what percent did it go up?
  33. 33.The price of a school bag changes from ₹1400 to ₹1260. By what percent did it come down?
  34. 34.The price of a school bag changes from ₹3480 to ₹5220. By what percent did it go up?
  35. 35.A water tank holds 3060 litres. 25% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹3540 to ₹4248. By what percent did it go up?
  37. 37.A water tank holds 3180 litres. 5% of the water is used. How many litres are left?
  38. 38.A town has 1220 people. Its population grows by 30%. How many people live there now?
  39. 39.The price of a school bag changes from ₹3360 to ₹3528. By what percent did it go up?
  40. 40.A water tank holds 4320 litres. 15% of the water is used. How many litres are left?

Answer key

  1. 50
  2. 2106
  3. 65
  4. 484
  5. 70
  6. 756
  7. 10
  8. 5650
  9. 80
  10. 5376
  11. 1372
  12. 10
  13. 3600
  14. 47.5
  15. 1440
  16. 12.5
  17. 4255
  18. 3610
  19. 888
  20. 5668
  21. 36
  22. 61
  23. 4179
  24. 1298
  25. 2160
  26. 2052
  27. 5
  28. 15
  29. 456
  30. 150
  31. 3078
  32. 10
  33. 10
  34. 50
  35. 2295
  36. 20
  37. 3021
  38. 1586
  39. 5
  40. 3672

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