Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 838 · 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. 1.160 increased by 35% =
2. 2.610 increased by 30% =
3. 3.60 increased by 25% =
4. 4.690 increased by 60% =
5. 5.584 decreased by 25% =
6. 6.360 decreased by 15% =
7. 7.125 decreased by 20% =
8. 8.525 increased by 12% =
9. 9.60 increased by 30% =
10. 10.625 increased by 8% =
11. 11.160 decreased by 5% =
12. 12.300 increased by 15% =
13. 13.484 increased by 50% =
14. 14.460 decreased by 5% =
15. 15.490 increased by 60% =
16. 16.650 decreased by 8% =
17. 17.40 increased by 10% =
18. 18.40 decreased by 15% =
19. 19.250 increased by 12% =
20. 20.800 decreased by 5% =
21. 21.404 decreased by 75% =
22. 22.260 increased by 15% =
23. 23.40 decreased by 10% =
24. 24.392 increased by 75% =
25. 25.380 decreased by 15% =
26. 26.140 increased by 5% =
27. 27.376 increased by 25% =
28. 28.672 decreased by 75% =
29. 29.615 decreased by 40% =
30. 30.800 decreased by 8% =
31. 31.130 decreased by 60% =
32. 32.495 increased by 60% =
33. 33.744 increased by 25% =
34. 34.60 decreased by 15% =
35. 35.120 increased by 30% =
36. 36.370 decreased by 30% =
37. 37.736 increased by 75% =
38. 38.625 increased by 12% =
39. 39.380 increased by 5% =
40. 40.240 increased by 40% =

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