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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 586 · 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 4240 people. Its population grows by 40%. How many people live there now?
  2. 2.A town has 4240 people. Its population grows by 30%. How many people live there now?
  3. 3.The price of a school bag changes from ₹520 to ₹468. By what percent did it come down?
  4. 4.A water tank holds 4240 litres. 5% of the water is used. How many litres are left?
  5. 5.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  6. 6.The price of a school bag changes from ₹2120 to ₹1272. By what percent did it come down?
  7. 7.The price of a school bag changes from ₹740 to ₹1110. By what percent did it go up?
  8. 8.A town has 3780 people. Its population grows by 30%. How many people live there now?
  9. 9.The price of a school bag changes from ₹880 to ₹1056. By what percent did it go up?
  10. 10.The price of a school bag changes from ₹3680 to ₹3864. By what percent did it go up?
  11. 11.A shop sells 2320 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  12. 12.The price of a school bag changes from ₹4920 to ₹3936. By what percent did it come down?
  13. 13.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  14. 14.The price of a school bag changes from ₹3740 to ₹4862. By what percent did it go up?
  15. 15.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  16. 16.A shop sells 5000 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  17. 17.A water tank holds 560 litres. 10% of the water is used. How many litres are left?
  18. 18.A water tank holds 1360 litres. 10% of the water is used. How many litres are left?
  19. 19.A water tank holds 4140 litres. 20% of the water is used. How many litres are left?
  20. 20.A water tank holds 1720 litres. 15% of the water is used. How many litres are left?
  21. 21.A price goes up by 50% and then comes down by 5%. By what percent has it gone up in all? =
  22. 22.A shop sells 2140 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  23. 23.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  24. 24.The price of a bicycle is ₹3800. It goes up by 5%. What is the new price (in ₹)?
  25. 25.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  26. 26.The price of a school bag changes from ₹3740 to ₹2805. By what percent did it come down?
  27. 27.A town has 1840 people. Its population grows by 25%. How many people live there now?
  28. 28.A town has 2480 people. Its population grows by 5%. How many people live there now?
  29. 29.A shop sells 600 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  30. 30.The price of a school bag changes from ₹3840 to ₹5376. By what percent did it go up?
  31. 31.A water tank holds 3340 litres. 5% of the water is used. How many litres are left?
  32. 32.The price of a bicycle is ₹1720. It goes up by 15%. What is the new price (in ₹)?
  33. 33.A water tank holds 400 litres. 50% of the water is used. How many litres are left?
  34. 34.A water tank holds 660 litres. 10% of the water is used. How many litres are left?
  35. 35.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  36. 36.A water tank holds 640 litres. 40% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹980 to ₹784. By what percent did it come down?
  38. 38.A water tank holds 2020 litres. 40% of the water is used. How many litres are left?
  39. 39.A shop sells 3720 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  40. 40.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =

Answer key

  1. 5936
  2. 5512
  3. 10
  4. 4028
  5. 23.5
  6. 40
  7. 50
  8. 4914
  9. 20
  10. 5
  11. 2900
  12. 20
  13. 36.5
  14. 30
  15. 20.75
  16. 7000
  17. 504
  18. 1224
  19. 3312
  20. 1462
  21. 42.5
  22. 2782
  23. 62.5
  24. 3990
  25. 33.5
  26. 25
  27. 2300
  28. 2604
  29. 750
  30. 40
  31. 3173
  32. 1978
  33. 200
  34. 594
  35. 26.5
  36. 384
  37. 20
  38. 1212
  39. 5208
  40. 70

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