Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 581 · 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. 1.80 increased by 20% =
2. 2.775 decreased by 40% =
3. 3.425 increased by 12% =
4. 4.680 increased by 5% =
5. 5.360 decreased by 50% =
6. 6.40 decreased by 20% =
7. 7.440 decreased by 35% =
8. 8.68 decreased by 75% =
9. 9.380 increased by 15% =
10. 10.550 increased by 12% =
11. 11.48 increased by 25% =
12. 12.780 increased by 5% =
13. 13.440 decreased by 5% =
14. 14.260 increased by 5% =
15. 15.220 increased by 20% =
16. 16.744 increased by 75% =
17. 17.540 increased by 30% =
18. 18.680 increased by 15% =
19. 19.656 decreased by 25% =
20. 20.380 increased by 5% =
21. 21.160 increased by 15% =
22. 22.50 increased by 8% =
23. 23.400 decreased by 12% =
24. 24.360 decreased by 15% =
25. 25.540 decreased by 15% =
26. 26.630 decreased by 30% =
27. 27.660 increased by 30% =
28. 28.275 decreased by 12% =
29. 29.125 decreased by 60% =
30. 30.80 increased by 5% =
31. 31.60 increased by 30% =
32. 32.260 decreased by 5% =
33. 33.592 decreased by 25% =
34. 34.555 increased by 60% =
35. 35.780 decreased by 35% =
36. 36.184 increased by 25% =
37. 37.160 decreased by 35% =
38. 38.540 increased by 20% =
39. 39.470 decreased by 40% =
40. 40.140 decreased by 5% =

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