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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 442 · 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 ₹1300 to ₹1430. By what percent did it go up?
  2. 2.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  3. 3.A shop sells 1560 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  4. 4.A shop sells 400 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  5. 5.A water tank holds 2140 litres. 30% of the water is used. How many litres are left?
  6. 6.A water tank holds 380 litres. 20% of the water is used. How many litres are left?
  7. 7.A water tank holds 1180 litres. 15% of the water is used. How many litres are left?
  8. 8.A water tank holds 4260 litres. 15% of the water is used. How many litres are left?
  9. 9.A shop sells 4240 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  10. 10.A town has 80 people. Its population grows by 25%. How many people live there now?
  11. 11.The price of a school bag changes from ₹3760 to ₹3196. By what percent did it come down?
  12. 12.The price of a bicycle is ₹840. It goes up by 15%. What is the new price (in ₹)?
  13. 13.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  14. 14.A shop sells 780 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  15. 15.The price of a school bag changes from ₹1520 to ₹1216. By what percent did it come down?
  16. 16.A water tank holds 220 litres. 15% of the water is used. How many litres are left?
  17. 17.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  18. 18.The price of a bicycle is ₹4000. It goes up by 20%. What is the new price (in ₹)?
  19. 19.A town has 3340 people. Its population grows by 10%. How many people live there now?
  20. 20.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  21. 21.A shop sells 3660 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  22. 22.A price goes up by 40% and then goes up by 20% more. By what percent has it gone up in all? =
  23. 23.A town has 1740 people. Its population grows by 25%. How many people live there now?
  24. 24.The price of a bicycle is ₹3560. It goes up by 50%. What is the new price (in ₹)?
  25. 25.The price of a school bag changes from ₹1160 to ₹1450. By what percent did it go up?
  26. 26.The price of a school bag changes from ₹580 to ₹754. By what percent did it go up?
  27. 27.The price of a bicycle is ₹4540. It goes up by 20%. What is the new price (in ₹)?
  28. 28.The price of a school bag changes from ₹2580 to ₹2322. By what percent did it come down?
  29. 29.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  30. 30.The price of a school bag changes from ₹680 to ₹748. By what percent did it go up?
  31. 31.A town has 4600 people. Its population grows by 10%. How many people live there now?
  32. 32.The price of a bicycle is ₹2500. It goes up by 5%. What is the new price (in ₹)?
  33. 33.A town has 4480 people. Its population grows by 30%. How many people live there now?
  34. 34.The price of a bicycle is ₹3180. It goes up by 25%. What is the new price (in ₹)?
  35. 35.The price of a bicycle is ₹1500. It goes up by 15%. What is the new price (in ₹)?
  36. 36.A town has 1680 people. Its population grows by 40%. How many people live there now?
  37. 37.A shop sells 2500 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  38. 38.A water tank holds 1140 litres. 40% of the water is used. How many litres are left?
  39. 39.A shop sells 2120 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  40. 40.A water tank holds 920 litres. 10% of the water is used. How many litres are left?

Answer key

  1. 10
  2. 50
  3. 2184
  4. 520
  5. 1498
  6. 304
  7. 1003
  8. 3621
  9. 4452
  10. 100
  11. 15
  12. 966
  13. 26.5
  14. 1092
  15. 20
  16. 187
  17. 82
  18. 4800
  19. 3674
  20. 32
  21. 4758
  22. 68
  23. 2175
  24. 5340
  25. 25
  26. 30
  27. 5448
  28. 10
  29. 51
  30. 10
  31. 5060
  32. 2625
  33. 5824
  34. 3975
  35. 1725
  36. 2352
  37. 3750
  38. 684
  39. 2650
  40. 828

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