Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 166 · 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 town has 4680 people. Its population grows by 5%. How many people live there now?
2. 2.The price of a school bag changes from ₹380 to ₹399. By what percent did it go up?
3. 3.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =
4. 4.A town has 3460 people. Its population grows by 50%. How many people live there now?
5. 5.A water tank holds 1140 litres. 5% of the water is used. How many litres are left?
6. 6.A water tank holds 3060 litres. 15% of the water is used. How many litres are left?
7. 7.The price of a school bag changes from ₹4840 to ₹2420. By what percent did it come down?
8. 8.The price of a school bag changes from ₹4920 to ₹6150. By what percent did it go up?
9. 9.A price comes down by 15% and then comes down by 40% more. By what percent has it come down in all? =
10. 10.A price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
11. 11.A water tank holds 960 litres. 50% of the water is used. How many litres are left?
12. 12.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
13. 13.A shop sells 3540 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
14. 14.A water tank holds 1780 litres. 40% of the water is used. How many litres are left?
15. 15.A town has 2240 people. Its population grows by 30%. How many people live there now?
16. 16.The price of a school bag changes from ₹2200 to ₹2750. By what percent did it go up?
17. 17.A water tank holds 4500 litres. 25% of the water is used. How many litres are left?
18. 18.A shop sells 4340 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
19. 19.A water tank holds 4300 litres. 50% of the water is used. How many litres are left?
20. 20.A water tank holds 3940 litres. 25% of the water is used. How many litres are left?
21. 21.A water tank holds 4220 litres. 50% of the water is used. How many litres are left?
22. 22.A shop sells 4820 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
23. 23.A water tank holds 4960 litres. 30% of the water is used. How many litres are left?
24. 24.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
25. 25.A water tank holds 2460 litres. 5% of the water is used. How many litres are left?
26. 26.A water tank holds 3360 litres. 40% of the water is used. How many litres are left?
27. 27.A shop sells 2660 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
28. 28.The price of a bicycle is ₹3780. It goes up by 5%. What is the new price (in ₹)?
29. 29.The price of a school bag changes from ₹1460 to ₹1679. By what percent did it go up?
30. 30.The price of a school bag changes from ₹720 to ₹792. By what percent did it go up?
31. 31.A water tank holds 1220 litres. 25% of the water is used. How many litres are left?
32. 32.A water tank holds 2340 litres. 50% of the water is used. How many litres are left?
33. 33.A price goes up by 25% and then goes up by 25% more. By what percent has it gone up in all? =
34. 34.The price of a school bag changes from ₹4820 to ₹7230. By what percent did it go up?
35. 35.The price of a bicycle is ₹4920. It goes up by 5%. What is the new price (in ₹)?
36. 36.A water tank holds 2420 litres. 10% of the water is used. How many litres are left?
37. 37.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
38. 38.A water tank holds 1520 litres. 20% of the water is used. How many litres are left?
39. 39.The price of a bicycle is ₹2860. It goes up by 30%. What is the new price (in ₹)?
40. 40.A water tank holds 1700 litres. 30% of the water is used. How many litres are left?

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