Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 497 · 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. 1.625 increased by 20% =
2. 2.720 increased by 15% =
3. 3.790 increased by 40% =
4. 4.435 decreased by 60% =
5. 5.400 increased by 8% =
6. 6.360 increased by 35% =
7. 7.480 decreased by 15% =
8. 8.540 decreased by 40% =
9. 9.150 increased by 30% =
10. 10.760 increased by 15% =
11. 11.304 increased by 25% =
12. 12.660 decreased by 5% =
13. 13.610 increased by 20% =
14. 14.600 decreased by 35% =
15. 15.580 increased by 15% =
16. 16.380 increased by 30% =
17. 17.548 decreased by 25% =
18. 18.284 increased by 75% =
19. 19.680 increased by 30% =
20. 20.750 increased by 10% =
21. 21.576 increased by 50% =
22. 22.460 increased by 35% =
23. 23.450 decreased by 20% =
24. 24.114 increased by 50% =
25. 25.800 decreased by 5% =
26. 26.490 decreased by 30% =
27. 27.120 increased by 15% =
28. 28.800 decreased by 15% =
29. 29.780 increased by 15% =
30. 30.64 increased by 25% =
31. 31.80 increased by 5% =
32. 32.450 increased by 30% =
33. 33.50 decreased by 12% =
34. 34.320 decreased by 40% =
35. 35.515 decreased by 60% =
36. 36.195 increased by 60% =
37. 37.390 decreased by 10% =
38. 38.60 decreased by 15% =
39. 39.340 increased by 30% =
40. 40.520 decreased by 5% =

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