Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 256 · 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. 1.500 increased by 8% =
2. 2.124 decreased by 25% =
3. 3.472 decreased by 25% =
4. 4.480 decreased by 35% =
5. 5.568 increased by 75% =
6. 6.164 decreased by 50% =
7. 7.750 decreased by 8% =
8. 8.280 increased by 5% =
9. 9.720 decreased by 35% =
10. 10.640 increased by 15% =
11. 11.275 increased by 8% =
12. 12.716 decreased by 50% =
13. 13.408 decreased by 75% =
14. 14.180 decreased by 25% =
15. 15.760 decreased by 15% =
16. 16.336 increased by 75% =
17. 17.635 decreased by 60% =
18. 18.320 increased by 5% =
19. 19.500 decreased by 40% =
20. 20.440 increased by 5% =
21. 21.400 increased by 35% =
22. 22.116 increased by 75% =
23. 23.790 increased by 10% =
24. 24.790 decreased by 10% =
25. 25.380 increased by 5% =
26. 26.420 decreased by 5% =
27. 27.120 increased by 15% =
28. 28.352 decreased by 75% =
29. 29.120 increased by 40% =
30. 30.150 increased by 60% =
31. 31.520 decreased by 5% =
32. 32.140 increased by 5% =
33. 33.204 increased by 75% =
34. 34.540 decreased by 10% =
35. 35.225 decreased by 20% =
36. 36.285 increased by 60% =
37. 37.400 decreased by 5% =
38. 38.584 decreased by 50% =
39. 39.60 increased by 5% =
40. 40.750 increased by 12% =

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