Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 22 · 40 questions

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.

1. 1.A price comes down by 30% and then comes down by 50% more. By what percent has it come down in all? =
2. 2.A water tank holds 2680 litres. 15% of the water is used. How many litres are left?
3. 3.A town has 940 people. Its population grows by 20%. How many people live there now?
4. 4.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
5. 5.The price of a school bag changes from ₹1600 to ₹2000. By what percent did it go up?
6. 6.A price goes up by 5% and then goes up by 50% more. By what percent has it gone up in all? =
7. 7.The price of a school bag changes from ₹4020 to ₹3417. By what percent did it come down?
8. 8.The price of a school bag changes from ₹4340 to ₹3689. By what percent did it come down?
9. 9.A water tank holds 1520 litres. 50% of the water is used. How many litres are left?
10. 10.The price of a school bag changes from ₹2780 to ₹1668. By what percent did it come down?
11. 11.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
12. 12.The price of a school bag changes from ₹2960 to ₹2072. By what percent did it come down?
13. 13.A shop sells 1080 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
14. 14.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
15. 15.A water tank holds 680 litres. 30% of the water is used. How many litres are left?
16. 16.The price of a school bag changes from ₹940 to ₹658. By what percent did it come down?
17. 17.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
18. 18.A shop sells 740 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
19. 19.A water tank holds 3120 litres. 40% of the water is used. How many litres are left?
20. 20.A water tank holds 700 litres. 5% of the water is used. How many litres are left?
21. 21.The price of a bicycle is ₹1760. It goes up by 20%. What is the new price (in ₹)?
22. 22.A water tank holds 4460 litres. 5% of the water is used. How many litres are left?
23. 23.A town has 520 people. Its population grows by 30%. How many people live there now?
24. 24.The price of a school bag changes from ₹1000 to ₹1500. By what percent did it go up?
25. 25.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
26. 26.A town has 4880 people. Its population grows by 10%. How many people live there now?
27. 27.The price of a school bag changes from ₹1240 to ₹1736. By what percent did it go up?
28. 28.The price of a bicycle is ₹1760. It goes up by 15%. What is the new price (in ₹)?
29. 29.A water tank holds 3420 litres. 20% of the water is used. How many litres are left?
30. 30.A water tank holds 4240 litres. 40% of the water is used. How many litres are left?
31. 31.The price of a school bag changes from ₹1580 to ₹1343. By what percent did it come down?
32. 32.A water tank holds 3380 litres. 30% of the water is used. How many litres are left?
33. 33.The price of a school bag changes from ₹1980 to ₹2475. By what percent did it go up?
34. 34.A water tank holds 3620 litres. 40% of the water is used. How many litres are left?
35. 35.A water tank holds 860 litres. 30% of the water is used. How many litres are left?
36. 36.The price of a bicycle is ₹1980. It goes up by 25%. What is the new price (in ₹)?
37. 37.The price of a bicycle is ₹4180. It goes up by 15%. What is the new price (in ₹)?
38. 38.A price goes up by 40% and then goes up by 20% more. By what percent has it gone up in all? =
39. 39.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
40. 40.A town has 580 people. Its population grows by 50%. How many people live there now?

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