← Percentage increase and decrease lesson New set →

Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 185 · 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 2880 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  2. 2.A water tank holds 700 litres. 50% of the water is used. How many litres are left?
  3. 3.A shop sells 2660 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  4. 4.A water tank holds 3940 litres. 5% of the water is used. How many litres are left?
  5. 5.A water tank holds 860 litres. 5% of the water is used. How many litres are left?
  6. 6.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =
  7. 7.A shop sells 3000 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  8. 8.A shop sells 1240 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  9. 9.A water tank holds 2360 litres. 5% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹1100 to ₹1320. By what percent did it go up?
  11. 11.The price of a bicycle is ₹4220. It goes up by 20%. What is the new price (in ₹)?
  12. 12.A water tank holds 120 litres. 5% of the water is used. How many litres are left?
  13. 13.A water tank holds 4620 litres. 40% of the water is used. How many litres are left?
  14. 14.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  15. 15.The price of a bicycle is ₹4700. It goes up by 25%. What is the new price (in ₹)?
  16. 16.A water tank holds 2660 litres. 20% of the water is used. How many litres are left?
  17. 17.A water tank holds 820 litres. 25% of the water is used. How many litres are left?
  18. 18.A water tank holds 1760 litres. 25% of the water is used. How many litres are left?
  19. 19.A price comes down by 25% and then comes down by 30% more. By what percent has it come down in all? =
  20. 20.A water tank holds 620 litres. 10% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹3240 to ₹4860. By what percent did it go up?
  22. 22.The price of a school bag changes from ₹2200 to ₹2860. By what percent did it go up?
  23. 23.A shop sells 1740 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  24. 24.A shop sells 4380 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  25. 25.A water tank holds 2480 litres. 50% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹3320 to ₹3818. By what percent did it go up?
  27. 27.The price of a bicycle is ₹3140. It goes up by 40%. What is the new price (in ₹)?
  28. 28.A water tank holds 3400 litres. 15% of the water is used. How many litres are left?
  29. 29.A water tank holds 840 litres. 20% of the water is used. How many litres are left?
  30. 30.The price of a bicycle is ₹560. It goes up by 25%. What is the new price (in ₹)?
  31. 31.The price of a school bag changes from ₹3220 to ₹4508. By what percent did it go up?
  32. 32.The price of a bicycle is ₹2740. It goes up by 5%. What is the new price (in ₹)?
  33. 33.A town has 2020 people. Its population grows by 50%. How many people live there now?
  34. 34.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  35. 35.A water tank holds 4780 litres. 50% of the water is used. How many litres are left?
  36. 36.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
  37. 37.A water tank holds 1200 litres. 5% of the water is used. How many litres are left?
  38. 38.A water tank holds 4240 litres. 5% of the water is used. How many litres are left?
  39. 39.The price of a bicycle is ₹2540. It goes up by 50%. What is the new price (in ₹)?
  40. 40.The price of a bicycle is ₹4240. It goes up by 20%. What is the new price (in ₹)?

Answer key

  1. 3456
  2. 350
  3. 2926
  4. 3743
  5. 817
  6. 75
  7. 3600
  8. 1736
  9. 2242
  10. 20
  11. 5064
  12. 114
  13. 2772
  14. 37.5
  15. 5875
  16. 2128
  17. 615
  18. 1320
  19. 47.5
  20. 558
  21. 50
  22. 30
  23. 2610
  24. 6570
  25. 1240
  26. 15
  27. 4396
  28. 2890
  29. 672
  30. 700
  31. 40
  32. 2877
  33. 3030
  34. 20.75
  35. 2390
  36. 58
  37. 1140
  38. 4028
  39. 3810
  40. 5088

Free quantitative aptitude lessons, practice and worksheets at talentjr.in/quantitative-aptitude