Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 385 · 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. 1.784 increased by 75% =
2. 2.575 increased by 20% =
3. 3.100 increased by 75% =
4. 4.145 decreased by 40% =
5. 5.510 increased by 60% =
6. 6.340 increased by 15% =
7. 7.708 decreased by 75% =
8. 8.252 decreased by 25% =
9. 9.490 decreased by 50% =
10. 10.540 decreased by 5% =
11. 11.125 increased by 12% =
12. 12.150 decreased by 8% =
13. 13.355 increased by 40% =
14. 14.275 increased by 8% =
15. 15.300 decreased by 35% =
16. 16.650 increased by 12% =
17. 17.80 increased by 10% =
18. 18.125 decreased by 8% =
19. 19.740 increased by 5% =
20. 20.100 decreased by 10% =
21. 21.325 increased by 60% =
22. 22.336 decreased by 75% =
23. 23.100 increased by 12% =
24. 24.110 increased by 30% =
25. 25.560 increased by 10% =
26. 26.545 increased by 40% =
27. 27.525 decreased by 40% =
28. 28.600 increased by 10% =
29. 29.140 increased by 40% =
30. 30.252 decreased by 75% =
31. 31.715 decreased by 20% =
32. 32.680 increased by 30% =
33. 33.536 decreased by 25% =
34. 34.690 increased by 20% =
35. 35.555 increased by 60% =
36. 36.360 increased by 35% =
37. 37.75 increased by 8% =
38. 38.260 decreased by 35% =
39. 39.750 decreased by 10% =
40. 40.190 increased by 20% =

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