Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 897 · 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 1400 litres. 10% of the water is used. How many litres are left?
2. 2.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
3. 3.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
4. 4.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
5. 5.A water tank holds 4880 litres. 15% of the water is used. How many litres are left?
6. 6.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
7. 7.The price of a school bag changes from ₹1480 to ₹1110. By what percent did it come down?
8. 8.The price of a school bag changes from ₹1080 to ₹1242. By what percent did it go up?
9. 9.The price of a bicycle is ₹3500. It goes up by 50%. What is the new price (in ₹)?
10. 10.The price of a bicycle is ₹1220. It goes up by 15%. What is the new price (in ₹)?
11. 11.A water tank holds 700 litres. 25% of the water is used. How many litres are left?
12. 12.The price of a school bag changes from ₹3460 to ₹3633. By what percent did it go up?
13. 13.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
14. 14.A town has 2640 people. Its population grows by 10%. How many people live there now?
15. 15.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
16. 16.The price of a bicycle is ₹2340. It goes up by 15%. What is the new price (in ₹)?
17. 17.The price of a school bag changes from ₹2380 to ₹2499. By what percent did it go up?
18. 18.The price of a school bag changes from ₹1360 to ₹1224. By what percent did it come down?
19. 19.The price of a school bag changes from ₹3000 to ₹3150. By what percent did it go up?
20. 20.A water tank holds 3460 litres. 20% of the water is used. How many litres are left?
21. 21.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
22. 22.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
23. 23.A water tank holds 2960 litres. 20% of the water is used. How many litres are left?
24. 24.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
25. 25.A shop sells 1540 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
26. 26.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
27. 27.The price of a school bag changes from ₹580 to ₹435. By what percent did it come down?
28. 28.The price of a school bag changes from ₹1820 to ₹1547. By what percent did it come down?
29. 29.The price of a school bag changes from ₹4240 to ₹3816. By what percent did it come down?
30. 30.A water tank holds 1160 litres. 5% of the water is used. How many litres are left?
31. 31.A town has 2740 people. Its population grows by 20%. How many people live there now?
32. 32.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
33. 33.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
34. 34.A town has 1400 people. Its population grows by 15%. How many people live there now?
35. 35.A water tank holds 2640 litres. 30% of the water is used. How many litres are left?
36. 36.A price goes up by 50% and then goes up by 40% more. By what percent has it gone up in all? =
37. 37.A water tank holds 3580 litres. 40% of the water is used. How many litres are left?
38. 38.The price of a bicycle is ₹2400. It goes up by 15%. What is the new price (in ₹)?
39. 39.The price of a bicycle is ₹3300. It goes up by 50%. What is the new price (in ₹)?
40. 40.A town has 2200 people. Its population grows by 20%. How many people live there now?

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