Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 746 · 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. 1.60 increased by 15% =
2. 2.115 increased by 20% =
3. 3.340 decreased by 10% =
4. 4.140 increased by 15% =
5. 5.620 decreased by 35% =
6. 6.630 increased by 60% =
7. 7.520 increased by 15% =
8. 8.595 decreased by 40% =
9. 9.160 increased by 15% =
10. 10.348 decreased by 50% =
11. 11.190 increased by 10% =
12. 12.600 increased by 8% =
13. 13.540 decreased by 15% =
14. 14.298 decreased by 50% =
15. 15.115 decreased by 40% =
16. 16.615 increased by 60% =
17. 17.275 decreased by 8% =
18. 18.170 decreased by 10% =
19. 19.200 decreased by 12% =
20. 20.175 decreased by 20% =
21. 21.325 increased by 12% =
22. 22.640 decreased by 35% =
23. 23.444 increased by 25% =
24. 24.460 decreased by 15% =
25. 25.116 decreased by 25% =
26. 26.140 increased by 35% =
27. 27.395 decreased by 40% =
28. 28.135 increased by 40% =
29. 29.320 increased by 10% =
30. 30.696 increased by 50% =
31. 31.320 decreased by 5% =
32. 32.412 increased by 75% =
33. 33.80 decreased by 5% =
34. 34.730 increased by 20% =
35. 35.380 increased by 15% =
36. 36.600 increased by 5% =
37. 37.520 decreased by 20% =
38. 38.418 decreased by 50% =
39. 39.750 increased by 40% =
40. 40.472 decreased by 50% =

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