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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 967 · 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 price comes down by 40% and then comes down by 30% more. By what percent has it come down in all? =
  2. 2.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =
  3. 3.A water tank holds 3660 litres. 10% of the water is used. How many litres are left?
  4. 4.A water tank holds 980 litres. 40% of the water is used. How many litres are left?
  5. 5.A water tank holds 1420 litres. 10% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹620 to ₹527. By what percent did it come down?
  7. 7.A water tank holds 760 litres. 30% of the water is used. How many litres are left?
  8. 8.A water tank holds 900 litres. 50% of the water is used. How many litres are left?
  9. 9.A water tank holds 4940 litres. 15% of the water is used. How many litres are left?
  10. 10.A shop sells 3240 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  11. 11.A water tank holds 520 litres. 5% of the water is used. How many litres are left?
  12. 12.A shop sells 3520 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  13. 13.The price of a school bag changes from ₹1600 to ₹2000. By what percent did it go up?
  14. 14.The price of a bicycle is ₹3160. It goes up by 50%. What is the new price (in ₹)?
  15. 15.A shop sells 4840 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  16. 16.A price goes up by 40% and then comes down by 20%. By what percent has it gone up in all? =
  17. 17.A price comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  18. 18.The price of a school bag changes from ₹100 to ₹125. By what percent did it go up?
  19. 19.The price of a school bag changes from ₹3280 to ₹3608. By what percent did it go up?
  20. 20.The price of a school bag changes from ₹1000 to ₹1150. By what percent did it go up?
  21. 21.The price of a school bag changes from ₹3700 to ₹5180. By what percent did it go up?
  22. 22.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  23. 23.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  24. 24.A town has 2440 people. Its population grows by 25%. How many people live there now?
  25. 25.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  26. 26.A town has 3560 people. Its population grows by 40%. How many people live there now?
  27. 27.The price of a bicycle is ₹1700. It goes up by 20%. What is the new price (in ₹)?
  28. 28.The price of a school bag changes from ₹1740 to ₹2001. By what percent did it go up?
  29. 29.The price of a bicycle is ₹3400. It goes up by 10%. What is the new price (in ₹)?
  30. 30.The price of a school bag changes from ₹2660 to ₹3458. By what percent did it go up?
  31. 31.A water tank holds 4960 litres. 5% of the water is used. How many litres are left?
  32. 32.A price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  33. 33.A town has 4300 people. Its population grows by 30%. How many people live there now?
  34. 34.A town has 180 people. Its population grows by 20%. How many people live there now?
  35. 35.A water tank holds 4700 litres. 20% of the water is used. How many litres are left?
  36. 36.A water tank holds 1740 litres. 50% of the water is used. How many litres are left?
  37. 37.A water tank holds 4780 litres. 30% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹3320 to ₹2656. By what percent did it come down?
  39. 39.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  40. 40.A water tank holds 2840 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 58
  2. 28
  3. 3294
  4. 588
  5. 1278
  6. 15
  7. 532
  8. 450
  9. 4199
  10. 4860
  11. 494
  12. 4048
  13. 25
  14. 4740
  15. 7260
  16. 12
  17. 33.5
  18. 25
  19. 10
  20. 15
  21. 40
  22. 43.75
  23. 43.75
  24. 3050
  25. 17
  26. 4984
  27. 2040
  28. 15
  29. 3740
  30. 30
  31. 4712
  32. 75
  33. 5590
  34. 216
  35. 3760
  36. 870
  37. 3346
  38. 20
  39. 55
  40. 2698

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