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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 797 · 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 town has 3720 people. Its population grows by 30%. How many people live there now?
  2. 2.The price of a school bag changes from ₹1920 to ₹2400. By what percent did it go up?
  3. 3.A price goes up by 25% and then goes up by 20% more. By what percent has it gone up in all? =
  4. 4.A town has 280 people. Its population grows by 15%. How many people live there now?
  5. 5.A shop sells 440 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  6. 6.A shop sells 4860 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  7. 7.The price of a school bag changes from ₹1720 to ₹1548. By what percent did it come down?
  8. 8.A water tank holds 3120 litres. 30% of the water is used. How many litres are left?
  9. 9.A water tank holds 1040 litres. 5% of the water is used. How many litres are left?
  10. 10.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  11. 11.The price of a school bag changes from ₹2860 to ₹3289. By what percent did it go up?
  12. 12.The price of a bicycle is ₹3820. It goes up by 15%. What is the new price (in ₹)?
  13. 13.A water tank holds 3300 litres. 25% of the water is used. How many litres are left?
  14. 14.A water tank holds 2000 litres. 15% of the water is used. How many litres are left?
  15. 15.A shop sells 3820 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  16. 16.The price of a school bag changes from ₹100 to ₹120. By what percent did it go up?
  17. 17.A shop sells 220 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  18. 18.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  19. 19.A water tank holds 2420 litres. 30% of the water is used. How many litres are left?
  20. 20.A water tank holds 2160 litres. 5% of the water is used. How many litres are left?
  21. 21.A water tank holds 1640 litres. 15% of the water is used. How many litres are left?
  22. 22.A water tank holds 460 litres. 20% of the water is used. How many litres are left?
  23. 23.A shop sells 1520 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  24. 24.A town has 3840 people. Its population grows by 5%. How many people live there now?
  25. 25.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =
  26. 26.The price of a school bag changes from ₹720 to ₹360. By what percent did it come down?
  27. 27.The price of a school bag changes from ₹100 to ₹50. By what percent did it come down?
  28. 28.The price of a school bag changes from ₹1400 to ₹700. By what percent did it come down?
  29. 29.The price of a school bag changes from ₹4940 to ₹6916. By what percent did it go up?
  30. 30.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  31. 31.A water tank holds 1040 litres. 40% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹2420 to ₹3388. By what percent did it go up?
  33. 33.A shop sells 1600 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  34. 34.A price comes down by 50% and then comes down by 25% more. By what percent has it come down in all? =
  35. 35.The price of a bicycle is ₹3100. It goes up by 40%. What is the new price (in ₹)?
  36. 36.A water tank holds 1940 litres. 10% of the water is used. How many litres are left?
  37. 37.A water tank holds 1800 litres. 10% of the water is used. How many litres are left?
  38. 38.A water tank holds 1060 litres. 30% of the water is used. How many litres are left?
  39. 39.A shop sells 3180 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  40. 40.A water tank holds 1660 litres. 20% of the water is used. How many litres are left?

Answer key

  1. 4836
  2. 25
  3. 50
  4. 322
  5. 462
  6. 5589
  7. 10
  8. 2184
  9. 988
  10. 80
  11. 15
  12. 4393
  13. 2475
  14. 1700
  15. 4584
  16. 20
  17. 330
  18. 43.75
  19. 1694
  20. 2052
  21. 1394
  22. 368
  23. 1824
  24. 4032
  25. 75
  26. 50
  27. 50
  28. 50
  29. 40
  30. 23.5
  31. 624
  32. 40
  33. 1680
  34. 62.5
  35. 4340
  36. 1746
  37. 1620
  38. 742
  39. 4452
  40. 1328

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