Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 61 · 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. 1.520 decreased by 5% =
2. 2.408 increased by 25% =
3. 3.450 increased by 60% =
4. 4.100 increased by 15% =
5. 5.225 decreased by 60% =
6. 6.236 decreased by 75% =
7. 7.590 increased by 20% =
8. 8.380 increased by 35% =
9. 9.120 increased by 15% =
10. 10.240 decreased by 15% =
11. 11.140 decreased by 15% =
12. 12.130 increased by 40% =
13. 13.615 increased by 40% =
14. 14.550 decreased by 8% =
15. 15.100 increased by 35% =
16. 16.50 decreased by 12% =
17. 17.456 increased by 25% =
18. 18.188 increased by 50% =
19. 19.448 increased by 25% =
20. 20.100 increased by 20% =
21. 21.460 increased by 15% =
22. 22.480 increased by 5% =
23. 23.90 decreased by 30% =
24. 24.45 increased by 60% =
25. 25.210 increased by 40% =
26. 26.300 increased by 8% =
27. 27.435 increased by 40% =
28. 28.760 increased by 15% =
29. 29.800 increased by 12% =
30. 30.360 increased by 10% =
31. 31.675 increased by 60% =
32. 32.308 increased by 75% =
33. 33.710 decreased by 10% =
34. 34.380 decreased by 10% =
35. 35.760 decreased by 30% =
36. 36.140 increased by 5% =
37. 37.284 increased by 25% =
38. 38.400 increased by 40% =
39. 39.320 decreased by 15% =
40. 40.625 decreased by 8% =

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