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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 237 · 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.The price of a school bag changes from ₹1920 to ₹1152. By what percent did it come down?
  2. 2.A water tank holds 3340 litres. 50% of the water is used. How many litres are left?
  3. 3.A water tank holds 2640 litres. 25% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹4840 to ₹6292. By what percent did it go up?
  5. 5.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  6. 6.A water tank holds 4640 litres. 20% of the water is used. How many litres are left?
  7. 7.The price of a school bag changes from ₹1060 to ₹1484. By what percent did it go up?
  8. 8.A water tank holds 1540 litres. 20% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹2200 to ₹1870. By what percent did it come down?
  10. 10.The price of a school bag changes from ₹4360 to ₹4578. By what percent did it go up?
  11. 11.A water tank holds 2440 litres. 25% of the water is used. How many litres are left?
  12. 12.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  13. 13.A water tank holds 2320 litres. 15% of the water is used. How many litres are left?
  14. 14.A town has 1360 people. Its population grows by 50%. How many people live there now?
  15. 15.A price comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  16. 16.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  17. 17.The price of a school bag changes from ₹4200 to ₹4410. By what percent did it go up?
  18. 18.A town has 1400 people. Its population grows by 15%. How many people live there now?
  19. 19.The price of a school bag changes from ₹1140 to ₹1197. By what percent did it go up?
  20. 20.A price goes up by 25% and then comes down by 10%. By what percent has it gone up in all? =
  21. 21.A water tank holds 80 litres. 40% of the water is used. How many litres are left?
  22. 22.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  23. 23.A water tank holds 3540 litres. 5% of the water is used. How many litres are left?
  24. 24.A water tank holds 3680 litres. 50% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹420 to ₹630. By what percent did it go up?
  26. 26.A price goes up by 50% and then goes up by 50% more. By what percent has it gone up in all? =
  27. 27.The price of a bicycle is ₹280. It goes up by 40%. What is the new price (in ₹)?
  28. 28.The price of a school bag changes from ₹3680 to ₹4416. By what percent did it go up?
  29. 29.A water tank holds 3840 litres. 15% of the water is used. How many litres are left?
  30. 30.The price of a bicycle is ₹80. It goes up by 20%. What is the new price (in ₹)?
  31. 31.A shop sells 2680 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  32. 32.The price of a school bag changes from ₹4360 to ₹6104. By what percent did it go up?
  33. 33.A town has 4960 people. Its population grows by 5%. How many people live there now?
  34. 34.The price of a school bag changes from ₹3740 to ₹3179. By what percent did it come down?
  35. 35.A water tank holds 2320 litres. 25% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹2880 to ₹1728. By what percent did it come down?
  37. 37.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  38. 38.A water tank holds 800 litres. 25% of the water is used. How many litres are left?
  39. 39.A town has 2340 people. Its population grows by 50%. How many people live there now?
  40. 40.A water tank holds 4460 litres. 25% of the water is used. How many litres are left?

Answer key

  1. 40
  2. 1670
  3. 1980
  4. 30
  5. 9.75
  6. 3712
  7. 40
  8. 1232
  9. 15
  10. 5
  11. 1830
  12. 36.5
  13. 1972
  14. 2040
  15. 33.5
  16. 20.75
  17. 5
  18. 1610
  19. 5
  20. 12.5
  21. 48
  22. 20.75
  23. 3363
  24. 1840
  25. 50
  26. 125
  27. 392
  28. 20
  29. 3264
  30. 96
  31. 4020
  32. 40
  33. 5208
  34. 15
  35. 1740
  36. 40
  37. 28.75
  38. 600
  39. 3510
  40. 3345

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