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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 947 · 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 700 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  2. 2.A town has 2400 people. Its population grows by 50%. How many people live there now?
  3. 3.A water tank holds 2060 litres. 5% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹4200 to ₹2100. By what percent did it come down?
  5. 5.The price of a school bag changes from ₹2260 to ₹2147. By what percent did it come down?
  6. 6.A town has 2080 people. Its population grows by 5%. How many people live there now?
  7. 7.A water tank holds 4160 litres. 5% of the water is used. How many litres are left?
  8. 8.The price of a bicycle is ₹1080. It goes up by 10%. What is the new price (in ₹)?
  9. 9.A shop sells 3720 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  10. 10.A water tank holds 680 litres. 10% of the water is used. How many litres are left?
  11. 11.A water tank holds 1980 litres. 25% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹4600 to ₹5060. By what percent did it go up?
  13. 13.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  14. 14.The price of a school bag changes from ₹1800 to ₹2160. By what percent did it go up?
  15. 15.A water tank holds 4320 litres. 40% of the water is used. How many litres are left?
  16. 16.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  17. 17.The price of a bicycle is ₹4840. It goes up by 20%. What is the new price (in ₹)?
  18. 18.A water tank holds 800 litres. 5% of the water is used. How many litres are left?
  19. 19.A water tank holds 2200 litres. 10% of the water is used. How many litres are left?
  20. 20.A price comes down by 25% and then comes down by 20% more. By what percent has it come down in all? =
  21. 21.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  22. 22.A shop sells 3400 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  23. 23.The price of a school bag changes from ₹2640 to ₹2508. By what percent did it come down?
  24. 24.A water tank holds 2480 litres. 15% of the water is used. How many litres are left?
  25. 25.A shop sells 1920 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  26. 26.The price of a school bag changes from ₹3280 to ₹3444. By what percent did it go up?
  27. 27.The price of a school bag changes from ₹260 to ₹156. By what percent did it come down?
  28. 28.The price of a school bag changes from ₹1660 to ₹1411. By what percent did it come down?
  29. 29.The price of a school bag changes from ₹1800 to ₹900. By what percent did it come down?
  30. 30.A shop sells 2220 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  31. 31.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  32. 32.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  33. 33.The price of a bicycle is ₹3160. It goes up by 15%. What is the new price (in ₹)?
  34. 34.A water tank holds 3800 litres. 30% of the water is used. How many litres are left?
  35. 35.A water tank holds 1960 litres. 5% of the water is used. How many litres are left?
  36. 36.The price of a bicycle is ₹4820. It goes up by 50%. What is the new price (in ₹)?
  37. 37.A water tank holds 340 litres. 30% of the water is used. How many litres are left?
  38. 38.A water tank holds 280 litres. 50% of the water is used. How many litres are left?
  39. 39.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
  40. 40.A shop sells 1700 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?

Answer key

  1. 805
  2. 3600
  3. 1957
  4. 50
  5. 5
  6. 2184
  7. 3952
  8. 1188
  9. 4278
  10. 612
  11. 1485
  12. 10
  13. 72.5
  14. 20
  15. 2592
  16. 4.5
  17. 5808
  18. 760
  19. 1980
  20. 40
  21. 55
  22. 4420
  23. 5
  24. 2108
  25. 2400
  26. 5
  27. 40
  28. 15
  29. 50
  30. 2664
  31. 37.5
  32. 37.5
  33. 3634
  34. 2660
  35. 1862
  36. 7230
  37. 238
  38. 140
  39. 6.25
  40. 2125

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