Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 224 · 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. 1.75 increased by 12% =
2. 2.368 decreased by 75% =
3. 3.780 increased by 35% =
4. 4.80 decreased by 10% =
5. 5.720 increased by 15% =
6. 6.120 increased by 5% =
7. 7.275 increased by 12% =
8. 8.450 increased by 8% =
9. 9.775 increased by 40% =
10. 10.790 decreased by 40% =
11. 11.680 decreased by 10% =
12. 12.220 increased by 5% =
13. 13.735 decreased by 40% =
14. 14.605 decreased by 60% =
15. 15.520 increased by 15% =
16. 16.310 decreased by 20% =
17. 17.560 decreased by 35% =
18. 18.220 increased by 35% =
19. 19.100 increased by 12% =
20. 20.500 increased by 15% =
21. 21.330 decreased by 10% =
22. 22.580 decreased by 10% =
23. 23.598 decreased by 50% =
24. 24.140 decreased by 75% =
25. 25.135 decreased by 60% =
26. 26.368 decreased by 75% =
27. 27.800 increased by 12% =
28. 28.200 decreased by 8% =
29. 29.610 increased by 30% =
30. 30.748 decreased by 25% =
31. 31.300 increased by 5% =
32. 32.165 decreased by 20% =
33. 33.225 increased by 40% =
34. 34.500 decreased by 15% =
35. 35.520 decreased by 35% =
36. 36.145 decreased by 40% =
37. 37.252 increased by 25% =
38. 38.332 decreased by 25% =
39. 39.440 increased by 35% =
40. 40.325 increased by 8% =

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