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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 776 · 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 1860 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  2. 2.A shop sells 2300 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  3. 3.A water tank holds 4020 litres. 30% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹4280 to ₹4922. By what percent did it go up?
  5. 5.The price of a school bag changes from ₹240 to ₹192. By what percent did it come down?
  6. 6.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  7. 7.The price of a school bag changes from ₹380 to ₹418. By what percent did it go up?
  8. 8.A shop sells 1020 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  9. 9.The price of a school bag changes from ₹2720 to ₹3400. By what percent did it go up?
  10. 10.A water tank holds 340 litres. 50% of the water is used. How many litres are left?
  11. 11.A water tank holds 4860 litres. 25% of the water is used. How many litres are left?
  12. 12.A town has 3760 people. Its population grows by 40%. How many people live there now?
  13. 13.A shop sells 920 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  14. 14.A shop sells 2420 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  15. 15.A water tank holds 1100 litres. 40% of the water is used. How many litres are left?
  16. 16.A water tank holds 640 litres. 10% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹3380 to ₹5070. By what percent did it go up?
  18. 18.The price of a bicycle is ₹2140. It goes up by 10%. What is the new price (in ₹)?
  19. 19.A town has 420 people. Its population grows by 40%. How many people live there now?
  20. 20.The price of a bicycle is ₹5000. It goes up by 25%. What is the new price (in ₹)?
  21. 21.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  22. 22.A water tank holds 1040 litres. 50% of the water is used. How many litres are left?
  23. 23.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  24. 24.A water tank holds 1140 litres. 5% of the water is used. How many litres are left?
  25. 25.A water tank holds 1380 litres. 40% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹1960 to ₹1862. By what percent did it come down?
  27. 27.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  28. 28.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  29. 29.The price of a school bag changes from ₹2960 to ₹3552. By what percent did it go up?
  30. 30.The price of a school bag changes from ₹2660 to ₹3325. By what percent did it go up?
  31. 31.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  32. 32.A water tank holds 580 litres. 5% of the water is used. How many litres are left?
  33. 33.A water tank holds 960 litres. 25% of the water is used. How many litres are left?
  34. 34.A price comes down by 20% and then comes down by 15% more. By what percent has it come down in all? =
  35. 35.The price of a bicycle is ₹3380. It goes up by 10%. What is the new price (in ₹)?
  36. 36.A shop sells 160 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  37. 37.The price of a bicycle is ₹2460. It goes up by 25%. What is the new price (in ₹)?
  38. 38.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  39. 39.A water tank holds 260 litres. 20% of the water is used. How many litres are left?
  40. 40.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =

Answer key

  1. 2325
  2. 2990
  3. 2814
  4. 15
  5. 20
  6. 33
  7. 10
  8. 1122
  9. 25
  10. 170
  11. 3645
  12. 5264
  13. 1380
  14. 2662
  15. 660
  16. 576
  17. 50
  18. 2354
  19. 588
  20. 6250
  21. 4
  22. 520
  23. 36.5
  24. 1083
  25. 828
  26. 5
  27. 21
  28. 10.25
  29. 20
  30. 25
  31. 52.5
  32. 551
  33. 720
  34. 32
  35. 3718
  36. 184
  37. 3075
  38. 27.5
  39. 208
  40. 28

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