Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 852 · 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. 1.460 decreased by 10% =
2. 2.225 decreased by 8% =
3. 3.460 increased by 5% =
4. 4.280 decreased by 30% =
5. 5.640 increased by 5% =
6. 6.580 increased by 35% =
7. 7.290 decreased by 30% =
8. 8.758 increased by 50% =
9. 9.160 increased by 60% =
10. 10.500 increased by 35% =
11. 11.580 decreased by 5% =
12. 12.280 decreased by 5% =
13. 13.80 decreased by 20% =
14. 14.610 increased by 20% =
15. 15.185 increased by 60% =
16. 16.100 decreased by 8% =
17. 17.575 decreased by 8% =
18. 18.120 increased by 75% =
19. 19.200 decreased by 30% =
20. 20.725 decreased by 8% =
21. 21.95 increased by 40% =
22. 22.140 decreased by 30% =
23. 23.200 increased by 5% =
24. 24.214 increased by 50% =
25. 25.425 increased by 60% =
26. 26.660 decreased by 10% =
27. 27.520 increased by 15% =
28. 28.255 decreased by 40% =
29. 29.680 decreased by 15% =
30. 30.220 decreased by 30% =
31. 31.740 decreased by 60% =
32. 32.668 decreased by 25% =
33. 33.280 increased by 30% =
34. 34.320 decreased by 5% =
35. 35.725 decreased by 12% =
36. 36.450 decreased by 30% =
37. 37.550 increased by 8% =
38. 38.134 increased by 50% =
39. 39.140 increased by 15% =
40. 40.480 decreased by 25% =

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