Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 58 · 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 4900 litres. 20% of the water is used. How many litres are left?
2. 2.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
3. 3.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
4. 4.A water tank holds 620 litres. 10% of the water is used. How many litres are left?
5. 5.A shop sells 4620 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
6. 6.A price goes up by 15% and then goes up by 50% more. By what percent has it gone up in all? =
7. 7.The price of a school bag changes from ₹3020 to ₹4530. By what percent did it go up?
8. 8.A water tank holds 1520 litres. 20% of the water is used. How many litres are left?
9. 9.A water tank holds 1100 litres. 10% of the water is used. How many litres are left?
10. 10.A town has 4280 people. Its population grows by 50%. How many people live there now?
11. 11.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
12. 12.The price of a school bag changes from ₹4940 to ₹5434. By what percent did it go up?
13. 13.The price of a bicycle is ₹2500. It goes up by 50%. What is the new price (in ₹)?
14. 14.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
15. 15.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
16. 16.A water tank holds 2540 litres. 10% of the water is used. How many litres are left?
17. 17.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
18. 18.The price of a bicycle is ₹2940. It goes up by 50%. What is the new price (in ₹)?
19. 19.A town has 3260 people. Its population grows by 10%. How many people live there now?
20. 20.The price of a bicycle is ₹3300. It goes up by 25%. What is the new price (in ₹)?
21. 21.A price comes down by 50% and then comes down by 30% more. By what percent has it come down in all? =
22. 22.A water tank holds 900 litres. 15% of the water is used. How many litres are left?
23. 23.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
24. 24.A water tank holds 4000 litres. 30% of the water is used. How many litres are left?
25. 25.A town has 260 people. Its population grows by 10%. How many people live there now?
26. 26.The price of a school bag changes from ₹4640 to ₹4872. By what percent did it go up?
27. 27.The price of a school bag changes from ₹3220 to ₹4025. By what percent did it go up?
28. 28.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
29. 29.A town has 280 people. Its population grows by 40%. How many people live there now?
30. 30.A water tank holds 4280 litres. 40% of the water is used. How many litres are left?
31. 31.A water tank holds 280 litres. 20% of the water is used. How many litres are left?
32. 32.A shop sells 4140 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
33. 33.A price comes down by 40% and then comes down by 10% more. By what percent has it come down in all? =
34. 34.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
35. 35.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
36. 36.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
37. 37.The price of a bicycle is ₹4340. It goes up by 5%. What is the new price (in ₹)?
38. 38.A water tank holds 1260 litres. 5% of the water is used. How many litres are left?
39. 39.A shop sells 2120 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
40. 40.A water tank holds 2220 litres. 5% of the water is used. How many litres are left?

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