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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 165 · 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 price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  2. 2.The price of a school bag changes from ₹1360 to ₹1156. By what percent did it come down?
  3. 3.A water tank holds 1100 litres. 50% of the water is used. How many litres are left?
  4. 4.A water tank holds 1720 litres. 10% of the water is used. How many litres are left?
  5. 5.A water tank holds 1140 litres. 20% of the water is used. How many litres are left?
  6. 6.A water tank holds 2580 litres. 10% of the water is used. How many litres are left?
  7. 7.The price of a school bag changes from ₹4180 to ₹3135. By what percent did it come down?
  8. 8.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  9. 9.A water tank holds 3040 litres. 15% of the water is used. How many litres are left?
  10. 10.A water tank holds 260 litres. 15% of the water is used. How many litres are left?
  11. 11.A water tank holds 4040 litres. 5% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹380 to ₹532. By what percent did it go up?
  13. 13.A water tank holds 3000 litres. 15% of the water is used. How many litres are left?
  14. 14.A price goes up by 20% and then goes up by 50% more. By what percent has it gone up in all? =
  15. 15.A water tank holds 200 litres. 25% of the water is used. How many litres are left?
  16. 16.A water tank holds 1500 litres. 5% of the water is used. How many litres are left?
  17. 17.A shop sells 620 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  18. 18.A town has 660 people. Its population grows by 10%. How many people live there now?
  19. 19.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  20. 20.The price of a school bag changes from ₹4200 to ₹3150. By what percent did it come down?
  21. 21.A shop sells 420 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  22. 22.A water tank holds 2880 litres. 30% of the water is used. How many litres are left?
  23. 23.A town has 580 people. Its population grows by 20%. How many people live there now?
  24. 24.The price of a bicycle is ₹3000. It goes up by 15%. What is the new price (in ₹)?
  25. 25.A shop sells 4840 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 ₹4720 to ₹6136. By what percent did it go up?
  27. 27.A water tank holds 60 litres. 50% of the water is used. How many litres are left?
  28. 28.A shop sells 580 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  29. 29.The price of a school bag changes from ₹2040 to ₹1836. By what percent did it come down?
  30. 30.A shop sells 1420 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  31. 31.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  32. 32.A water tank holds 280 litres. 15% of the water is used. How many litres are left?
  33. 33.The price of a bicycle is ₹3880. It goes up by 5%. What is the new price (in ₹)?
  34. 34.The price of a school bag changes from ₹4620 to ₹4851. By what percent did it go up?
  35. 35.A water tank holds 1440 litres. 5% of the water is used. How many litres are left?
  36. 36.A town has 3660 people. Its population grows by 5%. How many people live there now?
  37. 37.A water tank holds 3060 litres. 15% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹400 to ₹320. By what percent did it come down?
  39. 39.The price of a school bag changes from ₹3880 to ₹3492. By what percent did it come down?
  40. 40.A water tank holds 200 litres. 15% of the water is used. How many litres are left?

Answer key

  1. 46
  2. 15
  3. 550
  4. 1548
  5. 912
  6. 2322
  7. 25
  8. 27.5
  9. 2584
  10. 221
  11. 3838
  12. 40
  13. 2550
  14. 80
  15. 150
  16. 1425
  17. 651
  18. 726
  19. 35
  20. 25
  21. 462
  22. 2016
  23. 696
  24. 3450
  25. 6050
  26. 30
  27. 30
  28. 812
  29. 10
  30. 1562
  31. 43
  32. 238
  33. 4074
  34. 5
  35. 1368
  36. 3843
  37. 2601
  38. 20
  39. 10
  40. 170

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