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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 90 · 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 1520 people. Its population grows by 15%. How many people live there now?
  2. 2.The price of a bicycle is ₹1060. It goes up by 5%. What is the new price (in ₹)?
  3. 3.A shop sells 3680 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  4. 4.The price of a bicycle is ₹780. It goes up by 25%. What is the new price (in ₹)?
  5. 5.A shop sells 820 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  6. 6.The price of a school bag changes from ₹2340 to ₹2223. By what percent did it come down?
  7. 7.The price of a school bag changes from ₹4860 to ₹6318. By what percent did it go up?
  8. 8.A water tank holds 3940 litres. 10% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹5000 to ₹3750. By what percent did it come down?
  10. 10.The price of a school bag changes from ₹1340 to ₹1273. By what percent did it come down?
  11. 11.A water tank holds 4020 litres. 50% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹4120 to ₹4532. By what percent did it go up?
  13. 13.The price of a school bag changes from ₹4860 to ₹6075. By what percent did it go up?
  14. 14.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  15. 15.The price of a school bag changes from ₹1740 to ₹1827. By what percent did it go up?
  16. 16.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  17. 17.A town has 1420 people. Its population grows by 30%. How many people live there now?
  18. 18.A water tank holds 4060 litres. 30% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹3200 to ₹3840. By what percent did it go up?
  20. 20.A town has 660 people. Its population grows by 15%. How many people live there now?
  21. 21.A shop sells 2520 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  22. 22.The price of a bicycle is ₹4620. It goes up by 20%. What is the new price (in ₹)?
  23. 23.The price of a bicycle is ₹2520. It goes up by 30%. What is the new price (in ₹)?
  24. 24.A shop sells 2820 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  25. 25.The price of a bicycle is ₹3920. It goes up by 5%. What is the new price (in ₹)?
  26. 26.A water tank holds 4480 litres. 20% of the water is used. How many litres are left?
  27. 27.The price of a school bag changes from ₹2500 to ₹2750. By what percent did it go up?
  28. 28.A water tank holds 740 litres. 10% of the water is used. How many litres are left?
  29. 29.A water tank holds 4660 litres. 25% of the water is used. How many litres are left?
  30. 30.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
  31. 31.The price of a school bag changes from ₹580 to ₹667. By what percent did it go up?
  32. 32.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  33. 33.The price of a school bag changes from ₹220 to ₹231. By what percent did it go up?
  34. 34.A water tank holds 2320 litres. 10% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹4340 to ₹6076. By what percent did it go up?
  36. 36.A town has 840 people. Its population grows by 15%. How many people live there now?
  37. 37.The price of a school bag changes from ₹460 to ₹552. By what percent did it go up?
  38. 38.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  39. 39.A water tank holds 3380 litres. 15% of the water is used. How many litres are left?
  40. 40.A shop sells 4680 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?

Answer key

  1. 1748
  2. 1113
  3. 5152
  4. 975
  5. 902
  6. 5
  7. 30
  8. 3546
  9. 25
  10. 5
  11. 2010
  12. 10
  13. 25
  14. 9.25
  15. 5
  16. 37.5
  17. 1846
  18. 2842
  19. 20
  20. 759
  21. 3276
  22. 5544
  23. 3276
  24. 2961
  25. 4116
  26. 3584
  27. 10
  28. 666
  29. 3495
  30. 6.25
  31. 15
  32. 27.5
  33. 5
  34. 2088
  35. 40
  36. 966
  37. 20
  38. 26.5
  39. 2873
  40. 6084

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