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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 248 · 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 2520 litres. 25% of the water is used. How many litres are left?
  2. 2.A town has 2080 people. Its population grows by 15%. How many people live there now?
  3. 3.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
  4. 4.The price of a school bag changes from ₹3100 to ₹3410. By what percent did it go up?
  5. 5.The price of a school bag changes from ₹940 to ₹1081. By what percent did it go up?
  6. 6.The price of a school bag changes from ₹1300 to ₹780. By what percent did it come down?
  7. 7.A shop sells 2940 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  8. 8.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  9. 9.The price of a bicycle is ₹1200. It goes up by 40%. What is the new price (in ₹)?
  10. 10.A water tank holds 4620 litres. 10% of the water is used. How many litres are left?
  11. 11.A water tank holds 4600 litres. 40% of the water is used. How many litres are left?
  12. 12.A town has 480 people. Its population grows by 40%. How many people live there now?
  13. 13.The price of a school bag changes from ₹1520 to ₹1444. By what percent did it come down?
  14. 14.The price of a school bag changes from ₹2280 to ₹1140. By what percent did it come down?
  15. 15.A water tank holds 3840 litres. 15% of the water is used. How many litres are left?
  16. 16.A water tank holds 900 litres. 10% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹4020 to ₹4824. By what percent did it go up?
  18. 18.The price of a bicycle is ₹1380. It goes up by 40%. What is the new price (in ₹)?
  19. 19.The price of a school bag changes from ₹380 to ₹418. By what percent did it go up?
  20. 20.A shop sells 3100 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  21. 21.The price of a bicycle is ₹2220. It goes up by 5%. What is the new price (in ₹)?
  22. 22.A water tank holds 3700 litres. 30% of the water is used. How many litres are left?
  23. 23.The price of a bicycle is ₹320. It goes up by 40%. What is the new price (in ₹)?
  24. 24.A water tank holds 4760 litres. 40% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹2700 to ₹2025. By what percent did it come down?
  26. 26.The price of a school bag changes from ₹3340 to ₹4676. By what percent did it go up?
  27. 27.A shop sells 800 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  28. 28.The price of a school bag changes from ₹1880 to ₹2632. By what percent did it go up?
  29. 29.A water tank holds 2060 litres. 5% of the water is used. How many litres are left?
  30. 30.A water tank holds 1180 litres. 5% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹3060 to ₹2754. By what percent did it come down?
  32. 32.A shop sells 1900 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  33. 33.A price goes up by 40% and then comes down by 25%. By what percent has it gone up in all? =
  34. 34.The price of a school bag changes from ₹2640 to ₹2772. By what percent did it go up?
  35. 35.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  36. 36.A water tank holds 1820 litres. 20% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹1340 to ₹1876. By what percent did it go up?
  38. 38.The price of a bicycle is ₹4620. It goes up by 10%. What is the new price (in ₹)?
  39. 39.The price of a school bag changes from ₹3800 to ₹5320. By what percent did it go up?
  40. 40.A water tank holds 3100 litres. 50% of the water is used. How many litres are left?

Answer key

  1. 1890
  2. 2392
  3. 49.5
  4. 10
  5. 15
  6. 40
  7. 3822
  8. 57.5
  9. 1680
  10. 4158
  11. 2760
  12. 672
  13. 5
  14. 50
  15. 3264
  16. 810
  17. 20
  18. 1932
  19. 10
  20. 3875
  21. 2331
  22. 2590
  23. 448
  24. 2856
  25. 25
  26. 40
  27. 960
  28. 40
  29. 1957
  30. 1121
  31. 10
  32. 1995
  33. 5
  34. 5
  35. 35
  36. 1456
  37. 40
  38. 5082
  39. 40
  40. 1550

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