← Percentage increase and decrease lesson New set →

Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 403 · 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 water tank holds 560 litres. 40% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹3100 to ₹2480. By what percent did it come down?
  3. 3.A shop sells 2340 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  4. 4.The price of a school bag changes from ₹780 to ₹975. By what percent did it go up?
  5. 5.The price of a school bag changes from ₹3800 to ₹4940. By what percent did it go up?
  6. 6.A shop sells 1260 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  7. 7.A water tank holds 1200 litres. 40% of the water is used. How many litres are left?
  8. 8.A water tank holds 1360 litres. 10% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹3760 to ₹4700. By what percent did it go up?
  10. 10.The price of a school bag changes from ₹640 to ₹768. By what percent did it go up?
  11. 11.A shop sells 1040 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  12. 12.The price of a bicycle is ₹4660. It goes up by 50%. What is the new price (in ₹)?
  13. 13.The price of a school bag changes from ₹1120 to ₹1344. By what percent did it go up?
  14. 14.The price of a school bag changes from ₹4820 to ₹5543. By what percent did it go up?
  15. 15.A town has 4660 people. Its population grows by 40%. How many people live there now?
  16. 16.The price of a school bag changes from ₹3680 to ₹4416. By what percent did it go up?
  17. 17.A price comes down by 50% and then comes down by 20% more. By what percent has it come down in all? =
  18. 18.A water tank holds 2180 litres. 50% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹220 to ₹165. By what percent did it come down?
  20. 20.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  21. 21.A water tank holds 4820 litres. 40% of the water is used. How many litres are left?
  22. 22.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  23. 23.A town has 4440 people. Its population grows by 15%. How many people live there now?
  24. 24.The price of a bicycle is ₹3980. It goes up by 40%. What is the new price (in ₹)?
  25. 25.A town has 4160 people. Its population grows by 5%. How many people live there now?
  26. 26.The price of a school bag changes from ₹4660 to ₹6524. By what percent did it go up?
  27. 27.The price of a school bag changes from ₹920 to ₹1150. By what percent did it go up?
  28. 28.A water tank holds 1040 litres. 10% of the water is used. How many litres are left?
  29. 29.A water tank holds 3420 litres. 25% of the water is used. How many litres are left?
  30. 30.A water tank holds 4140 litres. 20% of the water is used. How many litres are left?
  31. 31.A price goes up by 10% and then goes up by 40% more. By what percent has it gone up in all? =
  32. 32.The price of a bicycle is ₹620. It goes up by 5%. What is the new price (in ₹)?
  33. 33.The price of a school bag changes from ₹3980 to ₹1990. By what percent did it come down?
  34. 34.The price of a school bag changes from ₹4800 to ₹4080. By what percent did it come down?
  35. 35.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  36. 36.The price of a school bag changes from ₹4040 to ₹3232. By what percent did it come down?
  37. 37.A water tank holds 3860 litres. 20% of the water is used. How many litres are left?
  38. 38.A water tank holds 2640 litres. 20% of the water is used. How many litres are left?
  39. 39.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
  40. 40.A shop sells 1660 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?

Answer key

  1. 336
  2. 20
  3. 2457
  4. 25
  5. 30
  6. 1890
  7. 720
  8. 1224
  9. 25
  10. 20
  11. 1560
  12. 6990
  13. 20
  14. 15
  15. 6524
  16. 20
  17. 60
  18. 1090
  19. 25
  20. 15.5
  21. 2892
  22. 62.5
  23. 5106
  24. 5572
  25. 4368
  26. 40
  27. 25
  28. 936
  29. 2565
  30. 3312
  31. 54
  32. 651
  33. 50
  34. 15
  35. 23.5
  36. 20
  37. 3088
  38. 2112
  39. 49.5
  40. 1909

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