← Percentage increase and decrease lesson New set →

Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 11 · 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 2680 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  2. 2.A water tank holds 4740 litres. 50% of the water is used. How many litres are left?
  3. 3.A shop sells 4040 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  4. 4.A town has 4200 people. Its population grows by 40%. How many people live there now?
  5. 5.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  6. 6.The price of a school bag changes from ₹3740 to ₹2992. By what percent did it come down?
  7. 7.The price of a school bag changes from ₹2840 to ₹3408. By what percent did it go up?
  8. 8.A water tank holds 4300 litres. 15% of the water is used. How many litres are left?
  9. 9.A water tank holds 820 litres. 25% of the water is used. How many litres are left?
  10. 10.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  11. 11.A water tank holds 4200 litres. 5% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹1040 to ₹1144. By what percent did it go up?
  13. 13.The price of a school bag changes from ₹1180 to ₹1534. By what percent did it go up?
  14. 14.A water tank holds 1200 litres. 20% of the water is used. How many litres are left?
  15. 15.A water tank holds 4260 litres. 5% of the water is used. How many litres are left?
  16. 16.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  17. 17.A town has 1280 people. Its population grows by 15%. How many people live there now?
  18. 18.A water tank holds 940 litres. 50% of the water is used. How many litres are left?
  19. 19.A water tank holds 4140 litres. 10% of the water is used. How many litres are left?
  20. 20.The price of a bicycle is ₹1480. It goes up by 20%. What is the new price (in ₹)?
  21. 21.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =
  22. 22.A shop sells 760 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  23. 23.A water tank holds 380 litres. 15% of the water is used. How many litres are left?
  24. 24.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  25. 25.A water tank holds 4460 litres. 30% of the water is used. How many litres are left?
  26. 26.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  27. 27.A price goes up by 40% and then comes down by 20%. By what percent has it gone up in all? =
  28. 28.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  29. 29.A water tank holds 1140 litres. 15% of the water is used. How many litres are left?
  30. 30.A water tank holds 3280 litres. 25% of the water is used. How many litres are left?
  31. 31.A town has 4300 people. Its population grows by 25%. How many people live there now?
  32. 32.A town has 2280 people. Its population grows by 5%. How many people live there now?
  33. 33.The price of a school bag changes from ₹620 to ₹651. By what percent did it go up?
  34. 34.A water tank holds 4000 litres. 15% of the water is used. How many litres are left?
  35. 35.A water tank holds 1480 litres. 15% of the water is used. How many litres are left?
  36. 36.A water tank holds 100 litres. 40% of the water is used. How many litres are left?
  37. 37.A town has 4240 people. Its population grows by 15%. How many people live there now?
  38. 38.A town has 3280 people. Its population grows by 10%. How many people live there now?
  39. 39.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  40. 40.A town has 2120 people. Its population grows by 5%. How many people live there now?

Answer key

  1. 2948
  2. 2370
  3. 4646
  4. 5880
  5. 61
  6. 20
  7. 20
  8. 3655
  9. 615
  10. 26.5
  11. 3990
  12. 10
  13. 30
  14. 960
  15. 4047
  16. 4.5
  17. 1472
  18. 470
  19. 3726
  20. 1776
  21. 28
  22. 1064
  23. 323
  24. 62.5
  25. 3122
  26. 37
  27. 12
  28. 37
  29. 969
  30. 2460
  31. 5375
  32. 2394
  33. 5
  34. 3400
  35. 1258
  36. 60
  37. 4876
  38. 3608
  39. 82
  40. 2226

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