Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 112 · 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 4060 litres. 15% of the water is used. How many litres are left?
2. 2.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
3. 3.A shop sells 820 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
4. 4.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
5. 5.A water tank holds 4080 litres. 20% of the water is used. How many litres are left?
6. 6.A shop sells 2840 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
7. 7.The price of a school bag changes from ₹1100 to ₹1540. By what percent did it go up?
8. 8.A town has 3780 people. Its population grows by 10%. How many people live there now?
9. 9.A water tank holds 620 litres. 15% of the water is used. How many litres are left?
10. 10.A shop sells 4920 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
11. 11.The price of a school bag changes from ₹1820 to ₹1911. By what percent did it go up?
12. 12.A water tank holds 3420 litres. 40% of the water is used. How many litres are left?
13. 13.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
14. 14.A price comes down by 40% and then comes down by 30% more. By what percent has it come down in all? =
15. 15.The price of a bicycle is ₹720. It goes up by 50%. What is the new price (in ₹)?
16. 16.The price of a school bag changes from ₹1660 to ₹1577. By what percent did it come down?
17. 17.A water tank holds 2560 litres. 5% of the water is used. How many litres are left?
18. 18.A water tank holds 1020 litres. 10% of the water is used. How many litres are left?
19. 19.A shop sells 2300 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
20. 20.A price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
21. 21.A town has 1020 people. Its population grows by 15%. How many people live there now?
22. 22.A town has 1940 people. Its population grows by 40%. How many people live there now?
23. 23.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
24. 24.A shop sells 3600 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
25. 25.A water tank holds 4540 litres. 30% of the water is used. How many litres are left?
26. 26.A shop sells 280 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
27. 27.The price of a school bag changes from ₹980 to ₹784. By what percent did it come down?
28. 28.A shop sells 3980 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
29. 29.The price of a school bag changes from ₹1500 to ₹1875. By what percent did it go up?
30. 30.The price of a bicycle is ₹880. It goes up by 50%. What is the new price (in ₹)?
31. 31.The price of a bicycle is ₹3260. It goes up by 20%. What is the new price (in ₹)?
32. 32.The price of a school bag changes from ₹4720 to ₹6136. By what percent did it go up?
33. 33.A shop sells 760 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
34. 34.A town has 2200 people. Its population grows by 15%. How many people live there now?
35. 35.A town has 3420 people. Its population grows by 10%. How many people live there now?
36. 36.A water tank holds 3300 litres. 40% of the water is used. How many litres are left?
37. 37.The price of a school bag changes from ₹3480 to ₹5220. By what percent did it go up?
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.The price of a bicycle is ₹1360. It goes up by 10%. What is the new price (in ₹)?
40. 40.A water tank holds 4560 litres. 20% of the water is used. How many litres are left?

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