Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 847 · 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 water tank holds 2900 litres. 10% of the water is used. How many litres are left?
2. 2.A shop sells 460 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
3. 3.A price comes down by 20% and then comes down by 30% more. By what percent has it come down in all? =
4. 4.The price of a school bag changes from ₹3260 to ₹4075. By what percent did it go up?
5. 5.A water tank holds 1620 litres. 50% of the water is used. How many litres are left?
6. 6.A water tank holds 4620 litres. 40% of the water is used. How many litres are left?
7. 7.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
8. 8.A water tank holds 520 litres. 25% of the water is used. How many litres are left?
9. 9.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
10. 10.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
11. 11.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
12. 12.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
13. 13.A price goes up by 20% and then comes down by 15%. By what percent has it gone up in all? =
14. 14.A shop sells 380 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
15. 15.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
16. 16.A water tank holds 2800 litres. 20% of the water is used. How many litres are left?
17. 17.A water tank holds 320 litres. 20% of the water is used. How many litres are left?
18. 18.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
19. 19.A water tank holds 560 litres. 25% of the water is used. How many litres are left?
20. 20.A town has 1160 people. Its population grows by 30%. How many people live there now?
21. 21.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
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.The price of a school bag changes from ₹2140 to ₹1498. By what percent did it come down?
24. 24.The price of a school bag changes from ₹2020 to ₹2323. By what percent did it go up?
25. 25.A water tank holds 1360 litres. 15% of the water is used. How many litres are left?
26. 26.A shop sells 700 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
27. 27.A price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
28. 28.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
29. 29.A water tank holds 2340 litres. 30% of the water is used. How many litres are left?
30. 30.The price of a bicycle is ₹2340. It goes up by 25%. What is the new price (in ₹)?
31. 31.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
32. 32.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
33. 33.The price of a school bag changes from ₹480 to ₹240. By what percent did it come down?
34. 34.The price of a school bag changes from ₹500 to ₹625. By what percent did it go up?
35. 35.The price of a school bag changes from ₹3500 to ₹2975. By what percent did it come down?
36. 36.A shop sells 4680 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
37. 37.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
38. 38.A shop sells 540 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
39. 39.The price of a bicycle is ₹4140. It goes up by 5%. What is the new price (in ₹)?
40. 40.A town has 1460 people. Its population grows by 10%. How many people live there now?

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