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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 846 · 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 2580 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  2. 2.The price of a school bag changes from ₹3880 to ₹4462. By what percent did it go up?
  3. 3.A shop sells 1840 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  4. 4.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  5. 5.A water tank holds 2200 litres. 40% of the water is used. How many litres are left?
  6. 6.A water tank holds 4460 litres. 50% of the water is used. How many litres are left?
  7. 7.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  8. 8.The price of a bicycle is ₹2740. It goes up by 10%. What is the new price (in ₹)?
  9. 9.The price of a school bag changes from ₹2000 to ₹1000. By what percent did it come down?
  10. 10.The price of a school bag changes from ₹3600 to ₹4320. By what percent did it go up?
  11. 11.A water tank holds 4660 litres. 5% of the water is used. How many litres are left?
  12. 12.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  13. 13.A water tank holds 220 litres. 25% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹3700 to ₹4070. By what percent did it go up?
  15. 15.A water tank holds 2560 litres. 5% of the water is used. How many litres are left?
  16. 16.A water tank holds 2960 litres. 10% of the water is used. How many litres are left?
  17. 17.A water tank holds 960 litres. 30% of the water is used. How many litres are left?
  18. 18.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  19. 19.A shop sells 2560 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  20. 20.The price of a school bag changes from ₹1620 to ₹2268. By what percent did it go up?
  21. 21.The price of a school bag changes from ₹4660 to ₹5592. By what percent did it go up?
  22. 22.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  23. 23.A town has 640 people. Its population grows by 15%. How many people live there now?
  24. 24.A water tank holds 2460 litres. 50% of the water is used. How many litres are left?
  25. 25.A town has 380 people. Its population grows by 20%. How many people live there now?
  26. 26.The price of a school bag changes from ₹420 to ₹630. By what percent did it go up?
  27. 27.The price of a bicycle is ₹1820. It goes up by 20%. What is the new price (in ₹)?
  28. 28.A water tank holds 2480 litres. 5% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹3100 to ₹2945. By what percent did it come down?
  30. 30.A town has 3420 people. Its population grows by 5%. How many people live there now?
  31. 31.A water tank holds 3460 litres. 50% of the water is used. How many litres are left?
  32. 32.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
  33. 33.The price of a bicycle is ₹1840. It goes up by 30%. What is the new price (in ₹)?
  34. 34.The price of a school bag changes from ₹1420 to ₹1846. By what percent did it go up?
  35. 35.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  36. 36.The price of a bicycle is ₹120. It goes up by 15%. What is the new price (in ₹)?
  37. 37.The price of a school bag changes from ₹280 to ₹308. By what percent did it go up?
  38. 38.A water tank holds 2400 litres. 5% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹560 to ₹448. By what percent did it come down?
  40. 40.A water tank holds 4100 litres. 15% of the water is used. How many litres are left?

Answer key

  1. 2838
  2. 15
  3. 2576
  4. 23.5
  5. 1320
  6. 2230
  7. 57.5
  8. 3014
  9. 50
  10. 20
  11. 4427
  12. 36.5
  13. 165
  14. 10
  15. 2432
  16. 2664
  17. 672
  18. 23.5
  19. 3072
  20. 40
  21. 20
  22. 43.75
  23. 736
  24. 1230
  25. 456
  26. 50
  27. 2184
  28. 2356
  29. 5
  30. 3591
  31. 1730
  32. 55
  33. 2392
  34. 30
  35. 96
  36. 138
  37. 10
  38. 2280
  39. 20
  40. 3485

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