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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 514 · 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 water tank holds 4340 litres. 50% of the water is used. How many litres are left?
  2. 2.A water tank holds 3780 litres. 30% of the water is used. How many litres are left?
  3. 3.The price of a bicycle is ₹3980. It goes up by 15%. What is the new price (in ₹)?
  4. 4.A town has 4180 people. Its population grows by 50%. How many people live there now?
  5. 5.A water tank holds 620 litres. 5% of the water is used. How many litres are left?
  6. 6.A shop sells 1840 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  7. 7.A town has 720 people. Its population grows by 30%. How many people live there now?
  8. 8.The price of a school bag changes from ₹1820 to ₹1274. By what percent did it come down?
  9. 9.A water tank holds 920 litres. 10% of the water is used. How many litres are left?
  10. 10.The price of a bicycle is ₹900. It goes up by 25%. What is the new price (in ₹)?
  11. 11.A town has 1080 people. Its population grows by 20%. How many people live there now?
  12. 12.The price of a school bag changes from ₹520 to ₹494. By what percent did it come down?
  13. 13.The price of a bicycle is ₹780. It goes up by 5%. What is the new price (in ₹)?
  14. 14.A shop sells 1060 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  15. 15.A water tank holds 520 litres. 5% of the water is used. How many litres are left?
  16. 16.A town has 600 people. Its population grows by 20%. How many people live there now?
  17. 17.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  18. 18.The price of a school bag changes from ₹220 to ₹209. By what percent did it come down?
  19. 19.A water tank holds 4100 litres. 30% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹900 to ₹1125. By what percent did it go up?
  21. 21.A water tank holds 3500 litres. 30% of the water is used. How many litres are left?
  22. 22.A shop sells 840 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  23. 23.A town has 2940 people. Its population grows by 50%. How many people live there now?
  24. 24.A water tank holds 2520 litres. 5% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹2220 to ₹2886. By what percent did it go up?
  26. 26.A water tank holds 4660 litres. 15% of the water is used. How many litres are left?
  27. 27.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  28. 28.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  29. 29.The price of a school bag changes from ₹1180 to ₹1416. By what percent did it go up?
  30. 30.A water tank holds 3640 litres. 30% of the water is used. How many litres are left?
  31. 31.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  32. 32.A shop sells 1040 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  33. 33.The price of a bicycle is ₹3700. It goes up by 30%. What is the new price (in ₹)?
  34. 34.A water tank holds 1420 litres. 25% of the water is used. How many litres are left?
  35. 35.A water tank holds 520 litres. 20% of the water is used. How many litres are left?
  36. 36.A water tank holds 2780 litres. 30% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹4560 to ₹3876. By what percent did it come down?
  38. 38.The price of a school bag changes from ₹4620 to ₹3234. By what percent did it come down?
  39. 39.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  40. 40.A town has 180 people. Its population grows by 5%. How many people live there now?

Answer key

  1. 2170
  2. 2646
  3. 4577
  4. 6270
  5. 589
  6. 1932
  7. 936
  8. 30
  9. 828
  10. 1125
  11. 1296
  12. 5
  13. 819
  14. 1113
  15. 494
  16. 720
  17. 23.5
  18. 5
  19. 2870
  20. 25
  21. 2450
  22. 1050
  23. 4410
  24. 2394
  25. 30
  26. 3961
  27. 36.25
  28. 46
  29. 20
  30. 2548
  31. 19
  32. 1248
  33. 4810
  34. 1065
  35. 416
  36. 1946
  37. 15
  38. 30
  39. 26.5
  40. 189

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