Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 72 · 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 3800 litres. 30% of the water is used. How many litres are left?
2. 2.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
3. 3.A shop sells 1320 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
4. 4.A water tank holds 1520 litres. 40% of the water is used. How many litres are left?
5. 5.The price of a school bag changes from ₹4820 to ₹5061. By what percent did it go up?
6. 6.A town has 2000 people. Its population grows by 20%. How many people live there now?
7. 7.The price of a school bag changes from ₹100 to ₹130. By what percent did it go up?
8. 8.A water tank holds 2680 litres. 20% of the water is used. How many litres are left?
9. 9.The price of a school bag changes from ₹660 to ₹693. By what percent did it go up?
10. 10.A water tank holds 700 litres. 50% of the water is used. How many litres are left?
11. 11.A water tank holds 280 litres. 40% of the water is used. How many litres are left?
12. 12.The price of a bicycle is ₹280. It goes up by 15%. What is the new price (in ₹)?
13. 13.A water tank holds 1180 litres. 50% of the water is used. How many litres are left?
14. 14.A water tank holds 600 litres. 20% of the water is used. How many litres are left?
15. 15.A water tank holds 1680 litres. 15% of the water is used. How many litres are left?
16. 16.The price of a school bag changes from ₹1480 to ₹1110. By what percent did it come down?
17. 17.A town has 2660 people. Its population grows by 30%. How many people live there now?
18. 18.The price of a school bag changes from ₹880 to ₹616. By what percent did it come down?
19. 19.A water tank holds 1440 litres. 25% of the water is used. How many litres are left?
20. 20.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
21. 21.The price of a school bag changes from ₹4180 to ₹5852. By what percent did it go up?
22. 22.The price of a bicycle is ₹3040. It goes up by 10%. What is the new price (in ₹)?
23. 23.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
24. 24.The price of a bicycle is ₹1940. It goes up by 30%. What is the new price (in ₹)?
25. 25.A water tank holds 4780 litres. 20% of the water is used. How many litres are left?
26. 26.The price of a school bag changes from ₹2520 to ₹2646. By what percent did it go up?
27. 27.A shop sells 360 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
28. 28.A water tank holds 360 litres. 25% of the water is used. How many litres are left?
29. 29.The price of a school bag changes from ₹3120 to ₹4680. By what percent did it go up?
30. 30.A water tank holds 1120 litres. 5% of the water is used. How many litres are left?
31. 31.A shop sells 4420 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
32. 32.The price of a bicycle is ₹4100. It goes up by 25%. What is the new price (in ₹)?
33. 33.A shop sells 1960 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
34. 34.The price of a school bag changes from ₹4860 to ₹5346. By what percent did it go up?
35. 35.A town has 3460 people. Its population grows by 5%. How many people live there now?
36. 36.The price of a school bag changes from ₹780 to ₹663. By what percent did it come down?
37. 37.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
38. 38.A shop sells 160 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
39. 39.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
40. 40.The price of a bicycle is ₹3780. It goes up by 20%. What is the new price (in ₹)?

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