Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 545 · 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 4800 people. Its population grows by 5%. How many people live there now?
2. 2.A water tank holds 4900 litres. 30% of the water is used. How many litres are left?
3. 3.The price of a school bag changes from ₹2720 to ₹2040. By what percent did it come down?
4. 4.The price of a bicycle is ₹880. It goes up by 5%. What is the new price (in ₹)?
5. 5.A water tank holds 340 litres. 20% of the water is used. How many litres are left?
6. 6.The price of a school bag changes from ₹4660 to ₹3262. By what percent did it come down?
7. 7.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
8. 8.A water tank holds 3460 litres. 20% of the water is used. How many litres are left?
9. 9.A water tank holds 4840 litres. 30% of the water is used. How many litres are left?
10. 10.The price of a bicycle is ₹4020. It goes up by 15%. What is the new price (in ₹)?
11. 11.A water tank holds 140 litres. 25% of the water is used. How many litres are left?
12. 12.A shop sells 4220 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
13. 13.The price of a school bag changes from ₹2860 to ₹3003. By what percent did it go up?
14. 14.A shop sells 3680 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
15. 15.A water tank holds 3160 litres. 20% of the water is used. How many litres are left?
16. 16.A town has 1640 people. Its population grows by 10%. How many people live there now?
17. 17.A water tank holds 4880 litres. 50% of the water is used. How many litres are left?
18. 18.The price of a school bag changes from ₹520 to ₹676. By what percent did it go up?
19. 19.A town has 1280 people. Its population grows by 25%. How many people live there now?
20. 20.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
21. 21.The price of a bicycle is ₹740. It goes up by 25%. What is the new price (in ₹)?
22. 22.The price of a bicycle is ₹2060. It goes up by 25%. What is the new price (in ₹)?
23. 23.A water tank holds 3780 litres. 10% of the water is used. How many litres are left?
24. 24.A shop sells 1740 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
25. 25.The price of a bicycle is ₹2400. It goes up by 40%. What is the new price (in ₹)?
26. 26.A water tank holds 2740 litres. 5% of the water is used. How many litres are left?
27. 27.The price of a bicycle is ₹2660. It goes up by 40%. What is the new price (in ₹)?
28. 28.A water tank holds 3360 litres. 40% of the water is used. How many litres are left?
29. 29.The price of a school bag changes from ₹1360 to ₹1156. By what percent did it come down?
30. 30.A water tank holds 1320 litres. 40% of the water is used. How many litres are left?
31. 31.A water tank holds 2640 litres. 20% of the water is used. How many litres are left?
32. 32.A water tank holds 4860 litres. 5% of the water is used. How many litres are left?
33. 33.The price of a bicycle is ₹1960. It goes up by 25%. What is the new price (in ₹)?
34. 34.A water tank holds 1880 litres. 15% of the water is used. How many litres are left?
35. 35.A water tank holds 1940 litres. 30% of the water is used. How many litres are left?
36. 36.A water tank holds 3260 litres. 20% of the water is used. How many litres are left?
37. 37.A water tank holds 3600 litres. 10% of the water is used. How many litres are left?
38. 38.The price of a school bag changes from ₹1760 to ₹1848. By what percent did it go up?
39. 39.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
40. 40.The price of a school bag changes from ₹2460 to ₹1722. By what percent did it come down?

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