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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 961 · 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 town has 1760 people. Its population grows by 15%. How many people live there now?
  2. 2.The price of a school bag changes from ₹1500 to ₹1800. By what percent did it go up?
  3. 3.A town has 3700 people. Its population grows by 10%. How many people live there now?
  4. 4.The price of a school bag changes from ₹3160 to ₹2844. By what percent did it come down?
  5. 5.The price of a school bag changes from ₹1880 to ₹1316. By what percent did it come down?
  6. 6.A water tank holds 980 litres. 20% of the water is used. How many litres are left?
  7. 7.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  8. 8.The price of a school bag changes from ₹3020 to ₹2114. By what percent did it come down?
  9. 9.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  10. 10.The price of a school bag changes from ₹3980 to ₹4179. By what percent did it go up?
  11. 11.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  12. 12.A shop sells 3500 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  13. 13.A water tank holds 3380 litres. 25% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹960 to ₹1056. By what percent did it go up?
  15. 15.The price of a bicycle is ₹1460. It goes up by 5%. What is the new price (in ₹)?
  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.The price of a school bag changes from ₹3560 to ₹2848. By what percent did it come down?
  18. 18.The price of a school bag changes from ₹960 to ₹672. By what percent did it come down?
  19. 19.The price of a school bag changes from ₹3320 to ₹4980. By what percent did it go up?
  20. 20.A price comes down by 5% and then comes down by 20% more. By what percent has it come down in all? =
  21. 21.The price of a bicycle is ₹1220. It goes up by 15%. What is the new price (in ₹)?
  22. 22.The price of a school bag changes from ₹2240 to ₹3360. By what percent did it go up?
  23. 23.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  24. 24.The price of a bicycle is ₹580. It goes up by 25%. What is the new price (in ₹)?
  25. 25.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  26. 26.A town has 720 people. Its population grows by 25%. How many people live there now?
  27. 27.A town has 3140 people. Its population grows by 25%. How many people live there now?
  28. 28.The price of a school bag changes from ₹580 to ₹348. By what percent did it come down?
  29. 29.A water tank holds 1460 litres. 40% of the water is used. How many litres are left?
  30. 30.A water tank holds 520 litres. 30% of the water is used. How many litres are left?
  31. 31.A water tank holds 920 litres. 10% of the water is used. How many litres are left?
  32. 32.A water tank holds 480 litres. 20% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹1020 to ₹765. By what percent did it come down?
  34. 34.A water tank holds 3600 litres. 30% of the water is used. How many litres are left?
  35. 35.A shop sells 4080 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  36. 36.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
  37. 37.A water tank holds 4300 litres. 5% of the water is used. How many litres are left?
  38. 38.A town has 1400 people. Its population grows by 5%. How many people live there now?
  39. 39.A town has 2040 people. Its population grows by 40%. How many people live there now?
  40. 40.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =

Answer key

  1. 2024
  2. 20
  3. 4070
  4. 10
  5. 30
  6. 784
  7. 10.25
  8. 30
  9. 35
  10. 5
  11. 37
  12. 5250
  13. 2535
  14. 10
  15. 1533
  16. 12.5
  17. 20
  18. 30
  19. 50
  20. 24
  21. 1403
  22. 50
  23. 38
  24. 725
  25. 61
  26. 900
  27. 3925
  28. 40
  29. 876
  30. 364
  31. 828
  32. 384
  33. 25
  34. 2520
  35. 5712
  36. 32
  37. 4085
  38. 1470
  39. 2856
  40. 32

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