Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 713 · 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. 1.724 increased by 75% =
2. 2.150 increased by 40% =
3. 3.404 decreased by 75% =
4. 4.260 decreased by 15% =
5. 5.650 increased by 40% =
6. 6.430 decreased by 40% =
7. 7.198 increased by 50% =
8. 8.500 increased by 15% =
9. 9.592 decreased by 25% =
10. 10.310 increased by 10% =
11. 11.140 increased by 10% =
12. 12.470 decreased by 10% =
13. 13.620 increased by 15% =
14. 14.520 increased by 5% =
15. 15.525 decreased by 12% =
16. 16.450 decreased by 20% =
17. 17.265 decreased by 60% =
18. 18.175 increased by 12% =
19. 19.180 increased by 5% =
20. 20.40 decreased by 5% =
21. 21.760 increased by 15% =
22. 22.775 increased by 20% =
23. 23.195 increased by 20% =
24. 24.185 increased by 60% =
25. 25.735 increased by 60% =
26. 26.792 decreased by 75% =
27. 27.305 increased by 60% =
28. 28.60 increased by 15% =
29. 29.530 increased by 20% =
30. 30.620 increased by 15% =
31. 31.625 increased by 60% =
32. 32.60 increased by 15% =
33. 33.100 decreased by 40% =
34. 34.590 increased by 20% =
35. 35.570 decreased by 30% =
36. 36.375 increased by 12% =
37. 37.130 increased by 20% =
38. 38.250 increased by 10% =
39. 39.200 increased by 15% =
40. 40.225 decreased by 8% =

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