Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 856 · 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. 1.125 decreased by 60% =
2. 2.140 decreased by 10% =
3. 3.400 decreased by 35% =
4. 4.440 increased by 5% =
5. 5.575 decreased by 8% =
6. 6.140 increased by 35% =
7. 7.700 decreased by 12% =
8. 8.96 decreased by 25% =
9. 9.350 decreased by 12% =
10. 10.400 increased by 8% =
11. 11.300 decreased by 12% =
12. 12.434 increased by 50% =
13. 13.260 increased by 35% =
14. 14.660 increased by 5% =
15. 15.675 increased by 40% =
16. 16.445 increased by 20% =
17. 17.76 decreased by 50% =
18. 18.714 increased by 50% =
19. 19.350 decreased by 10% =
20. 20.260 decreased by 15% =
21. 21.510 increased by 10% =
22. 22.540 decreased by 35% =
23. 23.220 increased by 20% =
24. 24.685 increased by 60% =
25. 25.330 increased by 10% =
26. 26.770 decreased by 20% =
27. 27.380 increased by 15% =
28. 28.118 decreased by 50% =
29. 29.300 increased by 12% =
30. 30.744 decreased by 25% =
31. 31.780 increased by 15% =
32. 32.350 increased by 60% =
33. 33.680 increased by 40% =
34. 34.200 increased by 12% =
35. 35.235 decreased by 20% =
36. 36.208 decreased by 25% =
37. 37.195 decreased by 20% =
38. 38.75 increased by 12% =
39. 39.596 increased by 50% =
40. 40.40 decreased by 30% =

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