Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 192 · 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. 1.275 decreased by 8% =
2. 2.644 decreased by 50% =
3. 3.675 increased by 12% =
4. 4.480 increased by 35% =
5. 5.175 decreased by 8% =
6. 6.730 increased by 40% =
7. 7.705 decreased by 20% =
8. 8.280 decreased by 15% =
9. 9.660 increased by 5% =
10. 10.305 increased by 60% =
11. 11.440 increased by 10% =
12. 12.240 increased by 10% =
13. 13.300 increased by 12% =
14. 14.275 increased by 40% =
15. 15.60 increased by 35% =
16. 16.640 increased by 5% =
17. 17.195 increased by 20% =
18. 18.288 increased by 25% =
19. 19.800 increased by 35% =
20. 20.660 increased by 5% =
21. 21.444 decreased by 25% =
22. 22.670 increased by 30% =
23. 23.275 increased by 8% =
24. 24.720 decreased by 30% =
25. 25.710 decreased by 30% =
26. 26.480 increased by 5% =
27. 27.125 decreased by 8% =
28. 28.725 decreased by 40% =
29. 29.760 decreased by 5% =
30. 30.665 increased by 20% =
31. 31.150 decreased by 12% =
32. 32.700 decreased by 35% =
33. 33.520 decreased by 15% =
34. 34.740 decreased by 5% =
35. 35.384 increased by 25% =
36. 36.540 decreased by 35% =
37. 37.410 increased by 30% =
38. 38.40 increased by 5% =
39. 39.100 decreased by 12% =
40. 40.110 increased by 50% =

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