Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 29 · 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. 1.260 increased by 35% =
2. 2.800 increased by 40% =
3. 3.60 increased by 10% =
4. 4.192 decreased by 75% =
5. 5.300 decreased by 25% =
6. 6.780 increased by 15% =
7. 7.650 decreased by 10% =
8. 8.380 increased by 5% =
9. 9.575 increased by 60% =
10. 10.125 increased by 12% =
11. 11.640 decreased by 75% =
12. 12.520 increased by 10% =
13. 13.50 increased by 20% =
14. 14.500 increased by 50% =
15. 15.645 increased by 40% =
16. 16.540 increased by 5% =
17. 17.625 decreased by 8% =
18. 18.540 decreased by 40% =
19. 19.660 increased by 35% =
20. 20.425 decreased by 8% =
21. 21.325 decreased by 12% =
22. 22.280 increased by 5% =
23. 23.585 decreased by 20% =
24. 24.450 decreased by 12% =
25. 25.612 decreased by 25% =
26. 26.660 increased by 5% =
27. 27.560 decreased by 30% =
28. 28.440 decreased by 15% =
29. 29.780 increased by 5% =
30. 30.792 increased by 75% =
31. 31.400 increased by 15% =
32. 32.690 decreased by 30% =
33. 33.168 increased by 25% =
34. 34.230 increased by 50% =
35. 35.756 increased by 75% =
36. 36.560 increased by 20% =
37. 37.636 decreased by 75% =
38. 38.675 increased by 12% =
39. 39.375 decreased by 12% =
40. 40.100 decreased by 12% =

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