Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 788 · 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. 1.120 decreased by 30% =
2. 2.424 increased by 50% =
3. 3.290 decreased by 10% =
4. 4.425 increased by 12% =
5. 5.540 increased by 40% =
6. 6.470 increased by 40% =
7. 7.230 decreased by 60% =
8. 8.240 decreased by 10% =
9. 9.310 decreased by 30% =
10. 10.432 increased by 75% =
11. 11.400 increased by 8% =
12. 12.360 decreased by 25% =
13. 13.250 increased by 8% =
14. 14.360 increased by 5% =
15. 15.690 decreased by 10% =
16. 16.800 decreased by 5% =
17. 17.115 decreased by 60% =
18. 18.40 increased by 15% =
19. 19.72 increased by 75% =
20. 20.200 increased by 12% =
21. 21.470 increased by 60% =
22. 22.374 increased by 50% =
23. 23.475 decreased by 40% =
24. 24.560 decreased by 5% =
25. 25.520 increased by 35% =
26. 26.240 decreased by 5% =
27. 27.175 increased by 8% =
28. 28.585 increased by 20% =
29. 29.220 decreased by 5% =
30. 30.80 increased by 35% =
31. 31.200 increased by 12% =
32. 32.780 decreased by 15% =
33. 33.460 decreased by 25% =
34. 34.215 decreased by 60% =
35. 35.300 increased by 15% =
36. 36.288 decreased by 75% =
37. 37.475 increased by 40% =
38. 38.680 increased by 15% =
39. 39.340 decreased by 15% =
40. 40.450 decreased by 20% =

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