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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 303 · 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 water tank holds 1100 litres. 15% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹1620 to ₹1701. By what percent did it go up?
  3. 3.The price of a bicycle is ₹4560. It goes up by 15%. What is the new price (in ₹)?
  4. 4.The price of a school bag changes from ₹2240 to ₹2464. By what percent did it go up?
  5. 5.A shop sells 480 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  6. 6.A town has 1480 people. Its population grows by 40%. How many people live there now?
  7. 7.The price of a bicycle is ₹720. It goes up by 10%. What is the new price (in ₹)?
  8. 8.The price of a school bag changes from ₹2500 to ₹2375. By what percent did it come down?
  9. 9.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  10. 10.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
  11. 11.A shop sells 4940 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  12. 12.A shop sells 900 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  13. 13.A water tank holds 640 litres. 15% of the water is used. How many litres are left?
  14. 14.A water tank holds 140 litres. 10% of the water is used. How many litres are left?
  15. 15.The price of a bicycle is ₹3160. It goes up by 10%. What is the new price (in ₹)?
  16. 16.A water tank holds 2540 litres. 30% of the water is used. How many litres are left?
  17. 17.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  18. 18.A shop sells 2700 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  19. 19.A water tank holds 4280 litres. 25% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹580 to ₹609. By what percent did it go up?
  21. 21.The price of a school bag changes from ₹2460 to ₹2337. By what percent did it come down?
  22. 22.The price of a school bag changes from ₹3180 to ₹3975. By what percent did it go up?
  23. 23.A water tank holds 1780 litres. 30% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹820 to ₹1025. By what percent did it go up?
  25. 25.A water tank holds 60 litres. 10% of the water is used. How many litres are left?
  26. 26.A water tank holds 2880 litres. 15% of the water is used. How many litres are left?
  27. 27.A water tank holds 1620 litres. 30% of the water is used. How many litres are left?
  28. 28.A water tank holds 2100 litres. 30% of the water is used. How many litres are left?
  29. 29.A water tank holds 4440 litres. 25% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹2760 to ₹3450. By what percent did it go up?
  31. 31.The price of a bicycle is ₹4660. It goes up by 20%. What is the new price (in ₹)?
  32. 32.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  33. 33.A shop sells 2640 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  34. 34.A shop sells 1660 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  35. 35.A town has 3420 people. Its population grows by 25%. How many people live there now?
  36. 36.The price of a bicycle is ₹1300. It goes up by 50%. What is the new price (in ₹)?
  37. 37.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  38. 38.The price of a school bag changes from ₹2960 to ₹3700. By what percent did it go up?
  39. 39.A water tank holds 4520 litres. 50% of the water is used. How many litres are left?
  40. 40.A water tank holds 3080 litres. 20% of the water is used. How many litres are left?

Answer key

  1. 935
  2. 5
  3. 5244
  4. 10
  5. 552
  6. 2072
  7. 792
  8. 5
  9. 61
  10. 55
  11. 5928
  12. 1260
  13. 544
  14. 126
  15. 3476
  16. 1778
  17. 75
  18. 3240
  19. 3210
  20. 5
  21. 5
  22. 25
  23. 1246
  24. 25
  25. 54
  26. 2448
  27. 1134
  28. 1470
  29. 3330
  30. 25
  31. 5592
  32. 20.75
  33. 3300
  34. 2075
  35. 4275
  36. 1950
  37. 65
  38. 25
  39. 2260
  40. 2464

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