Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 659 · 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. 1.410 decreased by 40% =
2. 2.128 increased by 75% =
3. 3.750 increased by 8% =
4. 4.75 decreased by 20% =
5. 5.620 decreased by 10% =
6. 6.125 increased by 12% =
7. 7.500 decreased by 12% =
8. 8.255 increased by 60% =
9. 9.140 increased by 35% =
10. 10.110 decreased by 60% =
11. 11.525 decreased by 20% =
12. 12.660 decreased by 5% =
13. 13.490 increased by 20% =
14. 14.200 increased by 12% =
15. 15.720 decreased by 30% =
16. 16.800 increased by 10% =
17. 17.780 increased by 15% =
18. 18.250 decreased by 40% =
19. 19.550 increased by 8% =
20. 20.350 increased by 12% =
21. 21.678 increased by 50% =
22. 22.300 increased by 12% =
23. 23.785 increased by 20% =
24. 24.320 increased by 35% =
25. 25.440 increased by 30% =
26. 26.40 increased by 25% =
27. 27.750 decreased by 60% =
28. 28.436 increased by 75% =
29. 29.304 increased by 75% =
30. 30.620 decreased by 35% =
31. 31.790 increased by 30% =
32. 32.470 increased by 10% =
33. 33.772 decreased by 50% =
34. 34.460 increased by 40% =
35. 35.310 decreased by 30% =
36. 36.360 decreased by 35% =
37. 37.500 decreased by 35% =
38. 38.140 increased by 35% =
39. 39.740 decreased by 35% =
40. 40.530 decreased by 40% =

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