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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 394 · 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.A water tank holds 420 litres. 5% of the water is used. How many litres are left?
  2. 2.A price goes up by 50% and then goes up by 50% more. By what percent has it gone up in all? =
  3. 3.The price of a school bag changes from ₹700 to ₹980. By what percent did it go up?
  4. 4.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  5. 5.The price of a school bag changes from ₹3100 to ₹2945. By what percent did it come down?
  6. 6.The price of a school bag changes from ₹3140 to ₹2826. By what percent did it come down?
  7. 7.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
  8. 8.The price of a school bag changes from ₹1300 to ₹910. By what percent did it come down?
  9. 9.The price of a school bag changes from ₹2880 to ₹3312. By what percent did it go up?
  10. 10.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  11. 11.The price of a school bag changes from ₹4460 to ₹3345. By what percent did it come down?
  12. 12.The price of a school bag changes from ₹3160 to ₹1580. By what percent did it come down?
  13. 13.The price of a school bag changes from ₹2120 to ₹2544. By what percent did it go up?
  14. 14.A town has 800 people. Its population grows by 25%. How many people live there now?
  15. 15.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  16. 16.The price of a bicycle is ₹3620. It goes up by 15%. What is the new price (in ₹)?
  17. 17.A shop sells 520 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  18. 18.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  19. 19.A water tank holds 700 litres. 10% of the water is used. How many litres are left?
  20. 20.A shop sells 560 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  21. 21.A shop sells 1020 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  22. 22.The price of a school bag changes from ₹2600 to ₹3250. By what percent did it go up?
  23. 23.A shop sells 640 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  24. 24.The price of a school bag changes from ₹2680 to ₹2546. By what percent did it come down?
  25. 25.A water tank holds 2040 litres. 30% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹320 to ₹304. By what percent did it come down?
  27. 27.A shop sells 4300 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  28. 28.A shop sells 4160 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  29. 29.The price of a school bag changes from ₹140 to ₹70. By what percent did it come down?
  30. 30.The price of a school bag changes from ₹4580 to ₹4351. By what percent did it come down?
  31. 31.A price comes down by 20% and then comes down by 40% more. By what percent has it come down in all? =
  32. 32.A water tank holds 4800 litres. 5% of the water is used. How many litres are left?
  33. 33.A shop sells 2100 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  34. 34.A price goes up by 50% and then goes up by 40% more. By what percent has it gone up in all? =
  35. 35.The price of a school bag changes from ₹4680 to ₹4914. By what percent did it go up?
  36. 36.A shop sells 2120 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  37. 37.A town has 120 people. Its population grows by 5%. How many people live there now?
  38. 38.A shop sells 2920 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  39. 39.A shop sells 1940 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  40. 40.The price of a school bag changes from ₹1000 to ₹850. By what percent did it come down?

Answer key

  1. 399
  2. 125
  3. 40
  4. 75
  5. 5
  6. 10
  7. 87.5
  8. 30
  9. 15
  10. 32
  11. 25
  12. 50
  13. 20
  14. 1000
  15. 9.25
  16. 4163
  17. 728
  18. 36.5
  19. 630
  20. 728
  21. 1275
  22. 25
  23. 672
  24. 5
  25. 1428
  26. 5
  27. 6450
  28. 6240
  29. 50
  30. 5
  31. 52
  32. 4560
  33. 3150
  34. 110
  35. 5
  36. 2226
  37. 126
  38. 3066
  39. 2328
  40. 15

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