Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 281 · 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. 1.604 increased by 25% =
2. 2.85 increased by 60% =
3. 3.440 increased by 15% =
4. 4.610 decreased by 30% =
5. 5.180 decreased by 15% =
6. 6.175 increased by 12% =
7. 7.200 increased by 10% =
8. 8.80 decreased by 20% =
9. 9.225 increased by 40% =
10. 10.800 increased by 60% =
11. 11.280 increased by 15% =
12. 12.100 increased by 15% =
13. 13.475 decreased by 8% =
14. 14.150 decreased by 8% =
15. 15.155 decreased by 20% =
16. 16.680 decreased by 10% =
17. 17.240 decreased by 35% =
18. 18.696 increased by 25% =
19. 19.620 increased by 20% =
20. 20.660 decreased by 35% =
21. 21.150 decreased by 12% =
22. 22.100 increased by 25% =
23. 23.740 decreased by 5% =
24. 24.428 increased by 25% =
25. 25.200 decreased by 5% =
26. 26.800 increased by 12% =
27. 27.80 decreased by 35% =
28. 28.115 decreased by 40% =
29. 29.158 decreased by 50% =
30. 30.220 increased by 35% =
31. 31.675 increased by 12% =
32. 32.260 decreased by 30% =
33. 33.728 decreased by 50% =
34. 34.775 increased by 12% =
35. 35.50 decreased by 12% =
36. 36.300 decreased by 15% =
37. 37.50 decreased by 12% =
38. 38.790 increased by 40% =
39. 39.225 decreased by 12% =
40. 40.184 decreased by 25% =

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