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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 70 · 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.The price of a school bag changes from ₹260 to ₹338. By what percent did it go up?
  2. 2.The price of a school bag changes from ₹2160 to ₹1836. By what percent did it come down?
  3. 3.A price comes down by 15% and then comes down by 30% more. By what percent has it come down in all? =
  4. 4.A shop sells 500 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  5. 5.The price of a bicycle is ₹3040. It goes up by 30%. What is the new price (in ₹)?
  6. 6.The price of a school bag changes from ₹960 to ₹1248. By what percent did it go up?
  7. 7.The price of a bicycle is ₹3780. It goes up by 10%. What is the new price (in ₹)?
  8. 8.The price of a bicycle is ₹820. It goes up by 25%. What is the new price (in ₹)?
  9. 9.The price of a school bag changes from ₹4520 to ₹3164. By what percent did it come down?
  10. 10.A town has 3060 people. Its population grows by 5%. How many people live there now?
  11. 11.The price of a bicycle is ₹4480. It goes up by 50%. What is the new price (in ₹)?
  12. 12.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  13. 13.A water tank holds 2320 litres. 15% of the water is used. How many litres are left?
  14. 14.The price of a bicycle is ₹4580. It goes up by 25%. What is the new price (in ₹)?
  15. 15.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  16. 16.A water tank holds 3820 litres. 20% of the water is used. How many litres are left?
  17. 17.A shop sells 4220 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  18. 18.A water tank holds 260 litres. 40% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹2060 to ₹2369. By what percent did it go up?
  20. 20.A town has 3660 people. Its population grows by 10%. How many people live there now?
  21. 21.A water tank holds 3340 litres. 25% of the water is used. How many litres are left?
  22. 22.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  23. 23.A shop sells 1480 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  24. 24.A water tank holds 600 litres. 40% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹1120 to ₹672. By what percent did it come down?
  26. 26.A water tank holds 1860 litres. 20% of the water is used. How many litres are left?
  27. 27.The price of a school bag changes from ₹3820 to ₹4011. By what percent did it go up?
  28. 28.A price goes up by 40% and then goes up by 50% more. By what percent has it gone up in all? =
  29. 29.A shop sells 1900 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  30. 30.A shop sells 2540 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  31. 31.A water tank holds 280 litres. 10% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹3320 to ₹3818. By what percent did it go up?
  33. 33.The price of a school bag changes from ₹780 to ₹897. By what percent did it go up?
  34. 34.A water tank holds 1380 litres. 5% of the water is used. How many litres are left?
  35. 35.A water tank holds 3080 litres. 20% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹200 to ₹250. By what percent did it go up?
  37. 37.The price of a school bag changes from ₹3980 to ₹5572. By what percent did it go up?
  38. 38.A town has 400 people. Its population grows by 15%. How many people live there now?
  39. 39.A water tank holds 2220 litres. 10% of the water is used. How many litres are left?
  40. 40.A water tank holds 2000 litres. 20% of the water is used. How many litres are left?

Answer key

  1. 30
  2. 15
  3. 40.5
  4. 700
  5. 3952
  6. 30
  7. 4158
  8. 1025
  9. 30
  10. 3213
  11. 6720
  12. 23.5
  13. 1972
  14. 5725
  15. 62.5
  16. 3056
  17. 6330
  18. 156
  19. 15
  20. 4026
  21. 2505
  22. 8
  23. 1702
  24. 360
  25. 40
  26. 1488
  27. 5
  28. 110
  29. 2090
  30. 2794
  31. 252
  32. 15
  33. 15
  34. 1311
  35. 2464
  36. 25
  37. 40
  38. 460
  39. 1998
  40. 1600

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