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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 829 · 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 420 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  2. 2.The price of a school bag changes from ₹4300 to ₹4515. By what percent did it go up?
  3. 3.A town has 3080 people. Its population grows by 15%. How many people live there now?
  4. 4.A shop sells 2120 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  5. 5.The price of a school bag changes from ₹380 to ₹475. By what percent did it go up?
  6. 6.A shop sells 1040 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  7. 7.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
  8. 8.A water tank holds 2460 litres. 25% of the water is used. How many litres are left?
  9. 9.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  10. 10.A water tank holds 1260 litres. 40% of the water is used. How many litres are left?
  11. 11.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  12. 12.A price goes up by 50% and then comes down by 5%. By what percent has it gone up in all? =
  13. 13.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  14. 14.A shop sells 360 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  15. 15.A water tank holds 1960 litres. 25% of the water is used. How many litres are left?
  16. 16.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  17. 17.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  18. 18.The price of a school bag changes from ₹3720 to ₹3348. By what percent did it come down?
  19. 19.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  20. 20.A town has 1940 people. Its population grows by 20%. How many people live there now?
  21. 21.A water tank holds 2420 litres. 5% of the water is used. How many litres are left?
  22. 22.A town has 3060 people. Its population grows by 50%. How many people live there now?
  23. 23.The price of a school bag changes from ₹1320 to ₹1056. By what percent did it come down?
  24. 24.The price of a school bag changes from ₹600 to ₹300. By what percent did it come down?
  25. 25.A shop sells 1540 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  26. 26.A water tank holds 2400 litres. 15% of the water is used. How many litres are left?
  27. 27.The price of a school bag changes from ₹2980 to ₹1788. By what percent did it come down?
  28. 28.A shop sells 160 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  29. 29.A shop sells 580 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  30. 30.A water tank holds 3580 litres. 40% of the water is used. How many litres are left?
  31. 31.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  32. 32.The price of a school bag changes from ₹4260 to ₹4047. By what percent did it come down?
  33. 33.The price of a bicycle is ₹1760. It goes up by 10%. What is the new price (in ₹)?
  34. 34.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  35. 35.A price comes down by 20% and then comes down by 15% more. By what percent has it come down in all? =
  36. 36.A water tank holds 520 litres. 40% of the water is used. How many litres are left?
  37. 37.A town has 4280 people. Its population grows by 25%. How many people live there now?
  38. 38.The price of a school bag changes from ₹380 to ₹361. By what percent did it come down?
  39. 39.A price comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =
  40. 40.A shop sells 2460 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?

Answer key

  1. 546
  2. 5
  3. 3542
  4. 3180
  5. 25
  6. 1352
  7. 36
  8. 1845
  9. 57.5
  10. 756
  11. 32
  12. 42.5
  13. 46
  14. 468
  15. 1470
  16. 36.5
  17. 43
  18. 10
  19. 56
  20. 2328
  21. 2299
  22. 4590
  23. 20
  24. 50
  25. 2002
  26. 2040
  27. 40
  28. 240
  29. 754
  30. 2148
  31. 95
  32. 5
  33. 1936
  34. 65
  35. 32
  36. 312
  37. 5350
  38. 5
  39. 32.5
  40. 2829

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