Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 41 · 40 questions

The fast method (One-step multiplier): Increase by p%: multiply by (100 + p)% — up 20% is × 1.2. Decrease by p%: multiply by (100 − p)% — down 25% is × 0.75. Easy way to multiply: × the whole number (115 or 75), then ÷ 100.

1. 1.530 increased by 10% =
2. 2.500 decreased by 30% =
3. 3.150 increased by 10% =
4. 4.252 increased by 25% =
5. 5.765 increased by 40% =
6. 6.720 decreased by 20% =
7. 7.55 increased by 20% =
8. 8.200 decreased by 8% =
9. 9.632 decreased by 75% =
10. 10.210 increased by 20% =
11. 11.725 increased by 20% =
12. 12.660 decreased by 15% =
13. 13.262 decreased by 50% =
14. 14.280 increased by 15% =
15. 15.720 increased by 5% =
16. 16.170 increased by 10% =
17. 17.125 increased by 20% =
18. 18.85 decreased by 20% =
19. 19.475 increased by 20% =
20. 20.708 decreased by 75% =
21. 21.260 decreased by 20% =
22. 22.325 decreased by 12% =
23. 23.216 increased by 75% =
24. 24.760 decreased by 30% =
25. 25.532 decreased by 25% =
26. 26.176 increased by 75% =
27. 27.360 decreased by 5% =
28. 28.512 increased by 25% =
29. 29.145 decreased by 40% =
30. 30.355 increased by 60% =
31. 31.328 increased by 25% =
32. 32.596 decreased by 25% =
33. 33.490 decreased by 30% =
34. 34.325 increased by 12% =
35. 35.790 increased by 10% =
36. 36.660 decreased by 15% =
37. 37.220 decreased by 5% =
38. 38.800 decreased by 12% =
39. 39.718 increased by 50% =
40. 40.400 increased by 40% =

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