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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 969 · 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 120 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  2. 2.A water tank holds 2820 litres. 10% of the water is used. How many litres are left?
  3. 3.A shop sells 180 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  4. 4.A town has 1400 people. Its population grows by 50%. How many people live there now?
  5. 5.A water tank holds 2000 litres. 25% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹3600 to ₹2160. By what percent did it come down?
  7. 7.A price comes down by 40% and then comes down by 10% more. By what percent has it come down in all? =
  8. 8.The price of a school bag changes from ₹2640 to ₹3696. By what percent did it go up?
  9. 9.A water tank holds 2400 litres. 5% of the water is used. How many litres are left?
  10. 10.A price goes up by 50% and then comes down by 30%. By what percent has it gone up in all? =
  11. 11.A water tank holds 1360 litres. 50% of the water is used. How many litres are left?
  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 town has 3720 people. Its population grows by 50%. How many people live there now?
  14. 14.The price of a school bag changes from ₹1460 to ₹1022. By what percent did it come down?
  15. 15.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  16. 16.A water tank holds 1120 litres. 30% of the water is used. How many litres are left?
  17. 17.A water tank holds 4200 litres. 15% of the water is used. How many litres are left?
  18. 18.A shop sells 1460 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  19. 19.A shop sells 660 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  20. 20.A water tank holds 2920 litres. 10% of the water is used. How many litres are left?
  21. 21.A town has 460 people. Its population grows by 15%. How many people live there now?
  22. 22.A water tank holds 2800 litres. 5% of the water is used. How many litres are left?
  23. 23.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  24. 24.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  25. 25.The price of a school bag changes from ₹3860 to ₹4053. By what percent did it go up?
  26. 26.The price of a school bag changes from ₹2800 to ₹1400. By what percent did it come down?
  27. 27.A town has 3080 people. Its population grows by 25%. How many people live there now?
  28. 28.The price of a school bag changes from ₹3820 to ₹4775. By what percent did it go up?
  29. 29.The price of a school bag changes from ₹1060 to ₹848. By what percent did it come down?
  30. 30.The price of a school bag changes from ₹1800 to ₹1440. By what percent did it come down?
  31. 31.The price of a school bag changes from ₹300 to ₹375. By what percent did it go up?
  32. 32.A water tank holds 180 litres. 5% of the water is used. How many litres are left?
  33. 33.A town has 4140 people. Its population grows by 20%. How many people live there now?
  34. 34.A water tank holds 520 litres. 10% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹880 to ₹924. By what percent did it go up?
  36. 36.The price of a bicycle is ₹1240. It goes up by 25%. What is the new price (in ₹)?
  37. 37.The price of a school bag changes from ₹1100 to ₹1650. By what percent did it go up?
  38. 38.A water tank holds 3080 litres. 15% of the water is used. How many litres are left?
  39. 39.A water tank holds 4780 litres. 5% of the water is used. How many litres are left?
  40. 40.A town has 1880 people. Its population grows by 15%. How many people live there now?

Answer key

  1. 126
  2. 2538
  3. 198
  4. 2100
  5. 1500
  6. 40
  7. 46
  8. 40
  9. 2280
  10. 5
  11. 680
  12. 42.5
  13. 5580
  14. 30
  15. 51
  16. 784
  17. 3570
  18. 2044
  19. 726
  20. 2628
  21. 529
  22. 2660
  23. 26.5
  24. 23.5
  25. 5
  26. 50
  27. 3850
  28. 25
  29. 20
  30. 20
  31. 25
  32. 171
  33. 4968
  34. 468
  35. 5
  36. 1550
  37. 50
  38. 2618
  39. 4541
  40. 2162

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