Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 226 · 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. 1.140 increased by 75% =
2. 2.650 increased by 8% =
3. 3.134 increased by 50% =
4. 4.642 increased by 50% =
5. 5.50 decreased by 10% =
6. 6.375 decreased by 12% =
7. 7.180 decreased by 10% =
8. 8.50 increased by 12% =
9. 9.560 decreased by 35% =
10. 10.630 increased by 50% =
11. 11.65 increased by 20% =
12. 12.440 decreased by 5% =
13. 13.48 increased by 75% =
14. 14.280 increased by 5% =
15. 15.120 increased by 10% =
16. 16.180 decreased by 35% =
17. 17.196 decreased by 75% =
18. 18.348 decreased by 25% =
19. 19.240 decreased by 40% =
20. 20.722 increased by 50% =
21. 21.544 increased by 25% =
22. 22.310 decreased by 10% =
23. 23.680 decreased by 20% =
24. 24.280 increased by 10% =
25. 25.400 increased by 15% =
26. 26.360 decreased by 15% =
27. 27.525 decreased by 8% =
28. 28.320 increased by 15% =
29. 29.325 decreased by 8% =
30. 30.295 increased by 40% =
31. 31.60 increased by 15% =
32. 32.100 decreased by 15% =
33. 33.300 increased by 5% =
34. 34.100 increased by 35% =
35. 35.585 decreased by 60% =
36. 36.240 decreased by 20% =
37. 37.690 increased by 10% =
38. 38.685 increased by 60% =
39. 39.440 increased by 5% =
40. 40.40 decreased by 5% =

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