Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 873 · 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. 1.95 decreased by 40% =
2. 2.150 decreased by 60% =
3. 3.165 increased by 60% =
4. 4.448 increased by 25% =
5. 5.365 increased by 40% =
6. 6.650 decreased by 30% =
7. 7.525 increased by 12% =
8. 8.680 increased by 20% =
9. 9.800 increased by 15% =
10. 10.670 increased by 30% =
11. 11.296 increased by 25% =
12. 12.60 decreased by 35% =
13. 13.725 decreased by 8% =
14. 14.220 increased by 35% =
15. 15.550 decreased by 12% =
16. 16.180 increased by 30% =
17. 17.100 decreased by 5% =
18. 18.660 decreased by 15% =
19. 19.720 decreased by 5% =
20. 20.490 decreased by 60% =
21. 21.420 increased by 10% =
22. 22.725 decreased by 12% =
23. 23.240 increased by 75% =
24. 24.40 increased by 15% =
25. 25.285 increased by 20% =
26. 26.240 increased by 15% =
27. 27.210 decreased by 10% =
28. 28.720 increased by 25% =
29. 29.280 decreased by 15% =
30. 30.680 decreased by 25% =
31. 31.760 decreased by 10% =
32. 32.625 increased by 12% =
33. 33.600 increased by 5% =
34. 34.525 increased by 12% =
35. 35.350 increased by 12% =
36. 36.190 increased by 20% =
37. 37.540 decreased by 40% =
38. 38.108 decreased by 75% =
39. 39.250 increased by 8% =
40. 40.470 increased by 30% =

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