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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 325 · 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 shop sells 2860 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  2. 2.The price of a school bag changes from ₹360 to ₹180. By what percent did it come down?
  3. 3.A water tank holds 1880 litres. 40% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹540 to ₹486. By what percent did it come down?
  5. 5.The price of a bicycle is ₹4360. It goes up by 30%. What is the new price (in ₹)?
  6. 6.A water tank holds 940 litres. 30% of the water is used. How many litres are left?
  7. 7.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  8. 8.A water tank holds 1420 litres. 10% of the water is used. How many litres are left?
  9. 9.A water tank holds 640 litres. 15% of the water is used. How many litres are left?
  10. 10.A water tank holds 4660 litres. 40% of the water is used. How many litres are left?
  11. 11.A water tank holds 3900 litres. 20% of the water is used. How many litres are left?
  12. 12.A town has 2160 people. Its population grows by 20%. How many people live there now?
  13. 13.The price of a bicycle is ₹3280. It goes up by 10%. What is the new price (in ₹)?
  14. 14.The price of a bicycle is ₹3680. It goes up by 5%. What is the new price (in ₹)?
  15. 15.A water tank holds 1480 litres. 30% of the water is used. How many litres are left?
  16. 16.A water tank holds 1460 litres. 15% of the water is used. How many litres are left?
  17. 17.A shop sells 1360 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  18. 18.The price of a school bag changes from ₹880 to ₹792. By what percent did it come down?
  19. 19.A water tank holds 2600 litres. 20% of the water is used. How many litres are left?
  20. 20.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  21. 21.A town has 4760 people. Its population grows by 15%. How many people live there now?
  22. 22.The price of a school bag changes from ₹3860 to ₹2895. By what percent did it come down?
  23. 23.The price of a school bag changes from ₹3260 to ₹1956. By what percent did it come down?
  24. 24.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  25. 25.The price of a school bag changes from ₹4280 to ₹4922. By what percent did it go up?
  26. 26.A water tank holds 3540 litres. 20% of the water is used. How many litres are left?
  27. 27.The price of a school bag changes from ₹4460 to ₹3122. By what percent did it come down?
  28. 28.The price of a school bag changes from ₹2680 to ₹2010. By what percent did it come down?
  29. 29.The price of a school bag changes from ₹2300 to ₹1380. By what percent did it come down?
  30. 30.A water tank holds 340 litres. 5% of the water is used. How many litres are left?
  31. 31.A water tank holds 1660 litres. 50% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹3780 to ₹3402. By what percent did it come down?
  33. 33.The price of a bicycle is ₹3500. It goes up by 15%. What is the new price (in ₹)?
  34. 34.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =
  35. 35.A water tank holds 4600 litres. 15% of the water is used. How many litres are left?
  36. 36.A water tank holds 1980 litres. 10% of the water is used. How many litres are left?
  37. 37.A water tank holds 1960 litres. 15% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹2980 to ₹2831. By what percent did it come down?
  39. 39.A water tank holds 80 litres. 10% of the water is used. How many litres are left?
  40. 40.A water tank holds 1400 litres. 10% of the water is used. How many litres are left?

Answer key

  1. 3575
  2. 50
  3. 1128
  4. 10
  5. 5668
  6. 658
  7. 15.5
  8. 1278
  9. 544
  10. 2796
  11. 3120
  12. 2592
  13. 3608
  14. 3864
  15. 1036
  16. 1241
  17. 1428
  18. 10
  19. 2080
  20. 20.75
  21. 5474
  22. 25
  23. 40
  24. 72.5
  25. 15
  26. 2832
  27. 30
  28. 25
  29. 40
  30. 323
  31. 830
  32. 10
  33. 4025
  34. 60
  35. 3910
  36. 1782
  37. 1666
  38. 5
  39. 72
  40. 1260

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