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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 576 · 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.The price of a school bag changes from ₹740 to ₹777. By what percent did it go up?
  2. 2.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  3. 3.A shop sells 3120 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  4. 4.A water tank holds 3580 litres. 50% of the water is used. How many litres are left?
  5. 5.A water tank holds 2640 litres. 10% of the water is used. How many litres are left?
  6. 6.A water tank holds 1940 litres. 10% of the water is used. How many litres are left?
  7. 7.A town has 3480 people. Its population grows by 20%. How many people live there now?
  8. 8.A water tank holds 880 litres. 20% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹300 to ₹270. By what percent did it come down?
  10. 10.The price of a bicycle is ₹3300. It goes up by 15%. What is the new price (in ₹)?
  11. 11.A water tank holds 220 litres. 15% of the water is used. How many litres are left?
  12. 12.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  13. 13.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  14. 14.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  15. 15.A town has 2340 people. Its population grows by 40%. How many people live there now?
  16. 16.A shop sells 520 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  17. 17.A water tank holds 420 litres. 25% of the water is used. How many litres are left?
  18. 18.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  19. 19.The price of a school bag changes from ₹2660 to ₹2527. By what percent did it come down?
  20. 20.The price of a school bag changes from ₹4980 to ₹5727. By what percent did it go up?
  21. 21.A water tank holds 3220 litres. 50% of the water is used. How many litres are left?
  22. 22.A shop sells 920 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  23. 23.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  24. 24.A water tank holds 260 litres. 5% of the water is used. How many litres are left?
  25. 25.The price of a bicycle is ₹620. It goes up by 5%. What is the new price (in ₹)?
  26. 26.A water tank holds 2660 litres. 15% of the water is used. How many litres are left?
  27. 27.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  28. 28.A shop sells 1220 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  29. 29.The price of a school bag changes from ₹3480 to ₹4524. By what percent did it go up?
  30. 30.A water tank holds 160 litres. 15% of the water is used. How many litres are left?
  31. 31.A water tank holds 2960 litres. 25% of the water is used. How many litres are left?
  32. 32.A water tank holds 1160 litres. 50% of the water is used. How many litres are left?
  33. 33.A town has 4340 people. Its population grows by 40%. How many people live there now?
  34. 34.The price of a school bag changes from ₹920 to ₹644. By what percent did it come down?
  35. 35.The price of a school bag changes from ₹1460 to ₹1825. By what percent did it go up?
  36. 36.The price of a school bag changes from ₹1940 to ₹1358. By what percent did it come down?
  37. 37.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  38. 38.The price of a school bag changes from ₹3760 to ₹3572. By what percent did it come down?
  39. 39.A water tank holds 2580 litres. 15% of the water is used. How many litres are left?
  40. 40.A shop sells 500 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?

Answer key

  1. 5
  2. 17
  3. 4680
  4. 1790
  5. 2376
  6. 1746
  7. 4176
  8. 704
  9. 10
  10. 3795
  11. 187
  12. 55
  13. 82
  14. 32
  15. 3276
  16. 650
  17. 315
  18. 9.25
  19. 5
  20. 15
  21. 1610
  22. 1104
  23. 4
  24. 247
  25. 651
  26. 2261
  27. 19.25
  28. 1281
  29. 30
  30. 136
  31. 2220
  32. 580
  33. 6076
  34. 30
  35. 25
  36. 30
  37. 15.5
  38. 5
  39. 2193
  40. 525

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