Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 17 · 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 3140 people. Its population grows by 15%. How many people live there now?
2. 2.The price of a bicycle is ₹640. It goes up by 50%. What is the new price (in ₹)?
3. 3.A water tank holds 3060 litres. 10% of the water is used. How many litres are left?
4. 4.The price of a school bag changes from ₹4600 to ₹5290. By what percent did it go up?
5. 5.The price of a bicycle is ₹3440. It goes up by 5%. What is the new price (in ₹)?
6. 6.A town has 1420 people. Its population grows by 15%. How many people live there now?
7. 7.A water tank holds 340 litres. 15% of the water is used. How many litres are left?
8. 8.The price of a bicycle is ₹220. It goes up by 15%. What is the new price (in ₹)?
9. 9.A water tank holds 4600 litres. 20% of the water is used. How many litres are left?
10. 10.A water tank holds 1640 litres. 40% of the water is used. How many litres are left?
11. 11.The price of a school bag changes from ₹4420 to ₹6188. By what percent did it go up?
12. 12.A water tank holds 500 litres. 15% of the water is used. How many litres are left?
13. 13.A water tank holds 2400 litres. 10% of the water is used. How many litres are left?
14. 14.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
15. 15.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
16. 16.The price of a school bag changes from ₹3920 to ₹5096. By what percent did it go up?
17. 17.A town has 880 people. Its population grows by 10%. How many people live there now?
18. 18.A water tank holds 4160 litres. 5% of the water is used. How many litres are left?
19. 19.A water tank holds 80 litres. 25% of the water is used. How many litres are left?
20. 20.A shop sells 2680 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
21. 21.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
22. 22.A water tank holds 2900 litres. 5% of the water is used. How many litres are left?
23. 23.A water tank holds 2700 litres. 10% of the water is used. How many litres are left?
24. 24.The price of a bicycle is ₹160. It goes up by 20%. What is the new price (in ₹)?
25. 25.A water tank holds 1800 litres. 30% of the water is used. How many litres are left?
26. 26.A shop sells 3340 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
27. 27.A town has 880 people. Its population grows by 30%. How many people live there now?
28. 28.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
29. 29.A town has 3820 people. Its population grows by 40%. How many people live there now?
30. 30.A water tank holds 860 litres. 25% of the water is used. How many litres are left?
31. 31.The price of a school bag changes from ₹2660 to ₹1995. By what percent did it come down?
32. 32.A town has 1100 people. Its population grows by 5%. How many people live there now?
33. 33.The price of a bicycle is ₹1200. It goes up by 20%. What is the new price (in ₹)?
34. 34.A water tank holds 1380 litres. 20% of the water is used. How many litres are left?
35. 35.A water tank holds 4100 litres. 40% of the water is used. How many litres are left?
36. 36.The price of a school bag changes from ₹4640 to ₹3712. By what percent did it come down?
37. 37.A water tank holds 2840 litres. 20% of the water is used. How many litres are left?
38. 38.A shop sells 940 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
39. 39.The price of a bicycle is ₹3180. It goes up by 25%. What is the new price (in ₹)?
40. 40.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =

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