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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 221 · 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 1440 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  2. 2.The price of a bicycle is ₹4480. It goes up by 5%. What is the new price (in ₹)?
  3. 3.A town has 1260 people. Its population grows by 50%. How many people live there now?
  4. 4.A shop sells 980 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  5. 5.A water tank holds 1820 litres. 15% of the water is used. How many litres are left?
  6. 6.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  7. 7.The price of a school bag changes from ₹1180 to ₹944. By what percent did it come down?
  8. 8.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  9. 9.The price of a bicycle is ₹1920. It goes up by 20%. What is the new price (in ₹)?
  10. 10.The price of a school bag changes from ₹3340 to ₹3674. By what percent did it go up?
  11. 11.A water tank holds 3260 litres. 5% of the water is used. How many litres are left?
  12. 12.A water tank holds 1620 litres. 40% of the water is used. How many litres are left?
  13. 13.A shop sells 100 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  14. 14.A water tank holds 3040 litres. 40% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹1060 to ₹901. By what percent did it come down?
  16. 16.A water tank holds 1120 litres. 25% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹4840 to ₹4598. By what percent did it come down?
  18. 18.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  19. 19.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  20. 20.A town has 1520 people. Its population grows by 50%. How many people live there now?
  21. 21.A town has 1640 people. Its population grows by 5%. How many people live there now?
  22. 22.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  23. 23.A town has 200 people. Its population grows by 40%. How many people live there now?
  24. 24.A shop sells 1420 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  25. 25.The price of a school bag changes from ₹1260 to ₹945. By what percent did it come down?
  26. 26.The price of a school bag changes from ₹100 to ₹130. By what percent did it go up?
  27. 27.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  28. 28.The price of a school bag changes from ₹4380 to ₹4818. By what percent did it go up?
  29. 29.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  30. 30.The price of a school bag changes from ₹940 to ₹470. By what percent did it come down?
  31. 31.A town has 4620 people. Its population grows by 20%. How many people live there now?
  32. 32.The price of a school bag changes from ₹1880 to ₹1692. By what percent did it come down?
  33. 33.A price goes up by 50% and then comes down by 30%. By what percent has it gone up in all? =
  34. 34.The price of a school bag changes from ₹4160 to ₹2080. By what percent did it come down?
  35. 35.The price of a school bag changes from ₹2400 to ₹3000. By what percent did it go up?
  36. 36.A shop sells 980 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  37. 37.A water tank holds 3440 litres. 25% of the water is used. How many litres are left?
  38. 38.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  39. 39.A water tank holds 280 litres. 30% of the water is used. How many litres are left?
  40. 40.A price comes down by 15% and then comes down by 30% more. By what percent has it come down in all? =

Answer key

  1. 1656
  2. 4704
  3. 1890
  4. 1176
  5. 1547
  6. 37
  7. 20
  8. 28.75
  9. 2304
  10. 10
  11. 3097
  12. 972
  13. 120
  14. 1824
  15. 15
  16. 840
  17. 5
  18. 43
  19. 14
  20. 2280
  21. 1722
  22. 75
  23. 280
  24. 1775
  25. 25
  26. 30
  27. 28.75
  28. 10
  29. 65
  30. 50
  31. 5544
  32. 10
  33. 5
  34. 50
  35. 25
  36. 1127
  37. 2580
  38. 57.5
  39. 196
  40. 40.5

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