Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 254 · 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. 1.175 decreased by 8% =
2. 2.425 increased by 12% =
3. 3.270 decreased by 10% =
4. 4.625 increased by 8% =
5. 5.256 decreased by 75% =
6. 6.568 increased by 75% =
7. 7.400 decreased by 8% =
8. 8.140 decreased by 15% =
9. 9.196 increased by 50% =
10. 10.760 decreased by 30% =
11. 11.200 decreased by 5% =
12. 12.40 increased by 60% =
13. 13.560 increased by 10% =
14. 14.260 decreased by 10% =
15. 15.250 increased by 60% =
16. 16.740 increased by 35% =
17. 17.595 decreased by 40% =
18. 18.300 decreased by 5% =
19. 19.300 increased by 25% =
20. 20.520 decreased by 30% =
21. 21.280 decreased by 15% =
22. 22.740 increased by 5% =
23. 23.645 increased by 40% =
24. 24.275 increased by 20% =
25. 25.50 increased by 12% =
26. 26.675 decreased by 8% =
27. 27.170 decreased by 10% =
28. 28.440 decreased by 10% =
29. 29.225 decreased by 60% =
30. 30.350 increased by 8% =
31. 31.150 increased by 8% =
32. 32.370 decreased by 30% =
33. 33.60 increased by 15% =
34. 34.50 increased by 40% =
35. 35.440 increased by 5% =
36. 36.350 decreased by 40% =
37. 37.580 increased by 5% =
38. 38.160 decreased by 15% =
39. 39.220 increased by 5% =
40. 40.578 decreased by 50% =

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