Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 215 · 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 1200 litres. 30% of the water is used. How many litres are left?
2. 2.A water tank holds 4780 litres. 40% of the water is used. How many litres are left?
3. 3.A water tank holds 4520 litres. 5% of the water is used. How many litres are left?
4. 4.A price comes down by 40% and then comes down by 30% more. By what percent has it come down in all? =
5. 5.A water tank holds 3840 litres. 20% of the water is used. How many litres are left?
6. 6.A water tank holds 4140 litres. 50% of the water is used. How many litres are left?
7. 7.A water tank holds 80 litres. 5% of the water is used. How many litres are left?
8. 8.A town has 2680 people. Its population grows by 20%. How many people live there now?
9. 9.A water tank holds 2320 litres. 10% of the water is used. How many litres are left?
10. 10.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
11. 11.A town has 2020 people. Its population grows by 20%. How many people live there now?
12. 12.A town has 2420 people. Its population grows by 25%. How many people live there now?
13. 13.A water tank holds 4880 litres. 15% of the water is used. How many litres are left?
14. 14.A shop sells 2520 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
15. 15.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
16. 16.A water tank holds 1540 litres. 50% of the water is used. How many litres are left?
17. 17.A water tank holds 460 litres. 25% of the water is used. How many litres are left?
18. 18.A water tank holds 2260 litres. 10% of the water is used. How many litres are left?
19. 19.A town has 940 people. Its population grows by 25%. How many people live there now?
20. 20.A shop sells 2760 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
21. 21.The price of a school bag changes from ₹3420 to ₹2736. By what percent did it come down?
22. 22.A water tank holds 2180 litres. 30% of the water is used. How many litres are left?
23. 23.A water tank holds 3880 litres. 5% of the water is used. How many litres are left?
24. 24.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
25. 25.The price of a school bag changes from ₹4420 to ₹4862. By what percent did it go up?
26. 26.A shop sells 2200 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
27. 27.A water tank holds 1760 litres. 40% of the water is used. How many litres are left?
28. 28.A town has 1240 people. Its population grows by 20%. How many people live there now?
29. 29.The price of a school bag changes from ₹3340 to ₹4008. By what percent did it go up?
30. 30.A water tank holds 1740 litres. 40% of the water is used. How many litres are left?
31. 31.A water tank holds 340 litres. 15% of the water is used. How many litres are left?
32. 32.A town has 1640 people. Its population grows by 25%. How many people live there now?
33. 33.The price of a bicycle is ₹2460. It goes up by 20%. What is the new price (in ₹)?
34. 34.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
35. 35.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
36. 36.A water tank holds 3500 litres. 30% of the water is used. How many litres are left?
37. 37.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
38. 38.A water tank holds 4940 litres. 25% of the water is used. How many litres are left?
39. 39.The price of a bicycle is ₹1340. It goes up by 30%. What is the new price (in ₹)?
40. 40.The price of a bicycle is ₹3080. It goes up by 20%. What is the new price (in ₹)?

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