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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 392 · 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 price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  2. 2.The price of a school bag changes from ₹2500 to ₹2875. By what percent did it go up?
  3. 3.The price of a school bag changes from ₹780 to ₹897. By what percent did it go up?
  4. 4.The price of a school bag changes from ₹2140 to ₹2247. By what percent did it go up?
  5. 5.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  6. 6.The price of a school bag changes from ₹2620 to ₹2751. By what percent did it go up?
  7. 7.The price of a bicycle is ₹3460. It goes up by 10%. What is the new price (in ₹)?
  8. 8.A water tank holds 340 litres. 50% of the water is used. How many litres are left?
  9. 9.A water tank holds 4220 litres. 25% of the water is used. How many litres are left?
  10. 10.A water tank holds 1020 litres. 30% of the water is used. How many litres are left?
  11. 11.The price of a bicycle is ₹2980. It goes up by 15%. What is the new price (in ₹)?
  12. 12.The price of a school bag changes from ₹4680 to ₹5148. By what percent did it go up?
  13. 13.A water tank holds 160 litres. 40% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹1920 to ₹1824. By what percent did it come down?
  15. 15.A shop sells 460 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  16. 16.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  17. 17.A water tank holds 940 litres. 5% of the water is used. How many litres are left?
  18. 18.A water tank holds 3340 litres. 5% of the water is used. How many litres are left?
  19. 19.A town has 3800 people. Its population grows by 5%. How many people live there now?
  20. 20.The price of a school bag changes from ₹4700 to ₹4230. By what percent did it come down?
  21. 21.A shop sells 440 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  22. 22.A water tank holds 2280 litres. 25% of the water is used. How many litres are left?
  23. 23.A water tank holds 1120 litres. 25% of the water is used. How many litres are left?
  24. 24.A shop sells 1060 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  25. 25.A shop sells 3100 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  26. 26.The price of a bicycle is ₹2260. It goes up by 20%. What is the new price (in ₹)?
  27. 27.A water tank holds 4800 litres. 5% of the water is used. How many litres are left?
  28. 28.A town has 800 people. Its population grows by 10%. How many people live there now?
  29. 29.A price comes down by 25% and then comes down by 20% more. By what percent has it come down in all? =
  30. 30.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  31. 31.A water tank holds 2040 litres. 20% of the water is used. How many litres are left?
  32. 32.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  33. 33.A water tank holds 1660 litres. 40% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹2460 to ₹2706. By what percent did it go up?
  35. 35.The price of a school bag changes from ₹2740 to ₹2877. By what percent did it go up?
  36. 36.The price of a school bag changes from ₹3300 to ₹2805. By what percent did it come down?
  37. 37.A water tank holds 3460 litres. 20% of the water is used. How many litres are left?
  38. 38.A town has 3280 people. Its population grows by 30%. How many people live there now?
  39. 39.A shop sells 2620 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  40. 40.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =

Answer key

  1. 43
  2. 15
  3. 15
  4. 5
  5. 80
  6. 5
  7. 3806
  8. 170
  9. 3165
  10. 714
  11. 3427
  12. 10
  13. 96
  14. 5
  15. 598
  16. 23.5
  17. 893
  18. 3173
  19. 3990
  20. 10
  21. 484
  22. 1710
  23. 840
  24. 1590
  25. 3720
  26. 2712
  27. 4560
  28. 880
  29. 40
  30. 36.5
  31. 1632
  32. 9.75
  33. 996
  34. 10
  35. 5
  36. 15
  37. 2768
  38. 4264
  39. 3275
  40. 58

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