Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 107 · 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.The price of a school bag changes from ₹3200 to ₹2240. By what percent did it come down?
2. 2.The price of a bicycle is ₹4680. It goes up by 30%. What is the new price (in ₹)?
3. 3.A town has 3640 people. Its population grows by 25%. How many people live there now?
4. 4.The price of a school bag changes from ₹4980 to ₹2490. By what percent did it come down?
5. 5.A water tank holds 3820 litres. 5% of the water is used. How many litres are left?
6. 6.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =
7. 7.The price of a school bag changes from ₹4700 to ₹5170. By what percent did it go up?
8. 8.A water tank holds 1860 litres. 40% of the water is used. How many litres are left?
9. 9.A water tank holds 1760 litres. 40% of the water is used. How many litres are left?
10. 10.A water tank holds 2600 litres. 20% of the water is used. How many litres are left?
11. 11.A water tank holds 3900 litres. 50% of the water is used. How many litres are left?
12. 12.The price of a school bag changes from ₹420 to ₹315. By what percent did it come down?
13. 13.A water tank holds 1540 litres. 5% of the water is used. How many litres are left?
14. 14.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
15. 15.A shop sells 2000 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
16. 16.A water tank holds 860 litres. 20% of the water is used. How many litres are left?
17. 17.A water tank holds 3640 litres. 20% of the water is used. How many litres are left?
18. 18.A water tank holds 3080 litres. 20% of the water is used. How many litres are left?
19. 19.A water tank holds 380 litres. 40% of the water is used. How many litres are left?
20. 20.A town has 4900 people. Its population grows by 10%. How many people live there now?
21. 21.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
22. 22.The price of a bicycle is ₹3840. It goes up by 50%. What is the new price (in ₹)?
23. 23.A water tank holds 4060 litres. 50% of the water is used. How many litres are left?
24. 24.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
25. 25.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
26. 26.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
27. 27.A water tank holds 380 litres. 30% of the water is used. How many litres are left?
28. 28.A price comes down by 20% and then comes down by 40% more. By what percent has it come down in all? =
29. 29.A shop sells 1400 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
30. 30.A water tank holds 260 litres. 40% of the water is used. How many litres are left?
31. 31.A water tank holds 1260 litres. 5% of the water is used. How many litres are left?
32. 32.A water tank holds 4540 litres. 10% of the water is used. How many litres are left?
33. 33.A water tank holds 4300 litres. 10% of the water is used. How many litres are left?
34. 34.The price of a school bag changes from ₹1120 to ₹784. By what percent did it come down?
35. 35.A water tank holds 1100 litres. 5% of the water is used. How many litres are left?
36. 36.A shop sells 4740 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
37. 37.A water tank holds 1320 litres. 5% of the water is used. How many litres are left?
38. 38.A water tank holds 3780 litres. 40% of the water is used. How many litres are left?
39. 39.A water tank holds 820 litres. 25% of the water is used. How many litres are left?
40. 40.A shop sells 260 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?

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