Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 530 · 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. 1.220 increased by 5% =
2. 2.785 decreased by 20% =
3. 3.200 increased by 12% =
4. 4.340 increased by 5% =
5. 5.420 decreased by 40% =
6. 6.480 decreased by 35% =
7. 7.575 decreased by 60% =
8. 8.200 increased by 20% =
9. 9.404 decreased by 75% =
10. 10.480 decreased by 5% =
11. 11.255 decreased by 20% =
12. 12.740 increased by 75% =
13. 13.180 decreased by 5% =
14. 14.300 increased by 12% =
15. 15.258 decreased by 50% =
16. 16.640 decreased by 5% =
17. 17.525 increased by 40% =
18. 18.530 decreased by 60% =
19. 19.85 increased by 60% =
20. 20.120 increased by 25% =
21. 21.320 increased by 15% =
22. 22.512 decreased by 50% =
23. 23.250 increased by 8% =
24. 24.568 decreased by 50% =
25. 25.440 increased by 35% =
26. 26.496 decreased by 25% =
27. 27.140 decreased by 60% =
28. 28.300 decreased by 40% =
29. 29.100 increased by 12% =
30. 30.80 increased by 60% =
31. 31.480 decreased by 30% =
32. 32.600 increased by 8% =
33. 33.200 increased by 35% =
34. 34.396 increased by 25% =
35. 35.420 decreased by 25% =
36. 36.256 decreased by 25% =
37. 37.220 increased by 15% =
38. 38.320 increased by 30% =
39. 39.760 decreased by 30% =
40. 40.160 increased by 30% =

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