Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 259 · 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. 1.144 increased by 25% =
2. 2.728 decreased by 25% =
3. 3.440 increased by 60% =
4. 4.90 decreased by 20% =
5. 5.380 increased by 25% =
6. 6.305 decreased by 60% =
7. 7.260 increased by 30% =
8. 8.135 increased by 20% =
9. 9.525 decreased by 12% =
10. 10.400 increased by 12% =
11. 11.120 increased by 75% =
12. 12.440 increased by 15% =
13. 13.600 decreased by 30% =
14. 14.475 decreased by 12% =
15. 15.360 decreased by 30% =
16. 16.725 increased by 20% =
17. 17.100 increased by 15% =
18. 18.568 increased by 75% =
19. 19.275 increased by 12% =
20. 20.100 decreased by 35% =
21. 21.240 decreased by 15% =
22. 22.625 increased by 8% =
23. 23.240 increased by 5% =
24. 24.625 decreased by 12% =
25. 25.240 increased by 10% =
26. 26.460 decreased by 35% =
27. 27.625 increased by 8% =
28. 28.580 decreased by 15% =
29. 29.525 decreased by 40% =
30. 30.625 increased by 12% =
31. 31.530 decreased by 40% =
32. 32.252 decreased by 75% =
33. 33.440 increased by 40% =
34. 34.685 increased by 40% =
35. 35.640 decreased by 10% =
36. 36.330 increased by 30% =
37. 37.440 increased by 35% =
38. 38.400 decreased by 5% =
39. 39.110 increased by 10% =
40. 40.100 increased by 10% =

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