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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 972 · 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 4140 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  2. 2.A water tank holds 2940 litres. 15% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹4000 to ₹3200. By what percent did it come down?
  4. 4.A shop sells 4740 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  5. 5.The price of a school bag changes from ₹1120 to ₹1400. By what percent did it go up?
  6. 6.A water tank holds 640 litres. 15% of the water is used. How many litres are left?
  7. 7.A shop sells 4660 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  8. 8.A shop sells 900 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  9. 9.A water tank holds 2260 litres. 15% of the water is used. How many litres are left?
  10. 10.A water tank holds 4160 litres. 30% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹4220 to ₹4642. By what percent did it go up?
  12. 12.A water tank holds 4300 litres. 5% of the water is used. How many litres are left?
  13. 13.The price of a bicycle is ₹2560. It goes up by 40%. What is the new price (in ₹)?
  14. 14.The price of a school bag changes from ₹500 to ₹550. By what percent did it go up?
  15. 15.A water tank holds 2000 litres. 15% of the water is used. How many litres are left?
  16. 16.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  17. 17.The price of a bicycle is ₹660. It goes up by 25%. What is the new price (in ₹)?
  18. 18.The price of a school bag changes from ₹4640 to ₹4176. By what percent did it come down?
  19. 19.The price of a school bag changes from ₹1900 to ₹2090. By what percent did it go up?
  20. 20.The price of a school bag changes from ₹4240 to ₹3180. By what percent did it come down?
  21. 21.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  22. 22.The price of a school bag changes from ₹3060 to ₹3213. By what percent did it go up?
  23. 23.A price goes up by 30% and then goes up by 30% more. By what percent has it gone up in all? =
  24. 24.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =
  25. 25.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  26. 26.The price of a school bag changes from ₹1980 to ₹2772. By what percent did it go up?
  27. 27.A town has 4600 people. Its population grows by 10%. How many people live there now?
  28. 28.A shop sells 2820 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  29. 29.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  30. 30.A water tank holds 1100 litres. 25% of the water is used. How many litres are left?
  31. 31.A water tank holds 3340 litres. 25% of the water is used. How many litres are left?
  32. 32.A water tank holds 260 litres. 50% of the water is used. How many litres are left?
  33. 33.A price comes down by 15% and then comes down by 40% more. By what percent has it come down in all? =
  34. 34.A water tank holds 4960 litres. 5% of the water is used. How many litres are left?
  35. 35.A water tank holds 1320 litres. 5% of the water is used. How many litres are left?
  36. 36.A town has 120 people. Its population grows by 50%. How many people live there now?
  37. 37.The price of a school bag changes from ₹820 to ₹697. By what percent did it come down?
  38. 38.A town has 5000 people. Its population grows by 50%. How many people live there now?
  39. 39.A water tank holds 3140 litres. 15% of the water is used. How many litres are left?
  40. 40.A water tank holds 4800 litres. 30% of the water is used. How many litres are left?

Answer key

  1. 4968
  2. 2499
  3. 20
  4. 5688
  5. 25
  6. 544
  7. 4893
  8. 1080
  9. 1921
  10. 2912
  11. 10
  12. 4085
  13. 3584
  14. 10
  15. 1700
  16. 15.5
  17. 825
  18. 10
  19. 10
  20. 25
  21. 37
  22. 5
  23. 69
  24. 75
  25. 37.5
  26. 40
  27. 5060
  28. 4230
  29. 95
  30. 825
  31. 2505
  32. 130
  33. 49
  34. 4712
  35. 1254
  36. 180
  37. 15
  38. 7500
  39. 2669
  40. 3360

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