Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 280 · 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. 1.260 decreased by 35% =
2. 2.48 decreased by 25% =
3. 3.365 decreased by 60% =
4. 4.450 decreased by 30% =
5. 5.360 increased by 15% =
6. 6.70 decreased by 20% =
7. 7.350 increased by 12% =
8. 8.150 decreased by 40% =
9. 9.114 decreased by 50% =
10. 10.680 increased by 15% =
11. 11.580 increased by 15% =
12. 12.175 decreased by 40% =
13. 13.308 decreased by 75% =
14. 14.725 decreased by 8% =
15. 15.465 decreased by 60% =
16. 16.200 increased by 12% =
17. 17.180 decreased by 5% =
18. 18.145 decreased by 40% =
19. 19.705 decreased by 20% =
20. 20.684 decreased by 25% =
21. 21.80 decreased by 5% =
22. 22.298 increased by 50% =
23. 23.420 decreased by 75% =
24. 24.128 increased by 50% =
25. 25.590 decreased by 10% =
26. 26.140 decreased by 5% =
27. 27.620 increased by 35% =
28. 28.520 decreased by 35% =
29. 29.464 decreased by 75% =
30. 30.108 increased by 75% =
31. 31.375 decreased by 12% =
32. 32.450 increased by 8% =
33. 33.680 increased by 25% =
34. 34.365 increased by 60% =
35. 35.440 decreased by 15% =
36. 36.528 decreased by 75% =
37. 37.180 increased by 35% =
38. 38.40 increased by 15% =
39. 39.180 increased by 15% =
40. 40.268 decreased by 25% =

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