Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 752 · 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. 1.450 increased by 8% =
2. 2.380 increased by 5% =
3. 3.590 decreased by 30% =
4. 4.140 decreased by 30% =
5. 5.300 increased by 8% =
6. 6.770 increased by 50% =
7. 7.425 decreased by 8% =
8. 8.500 decreased by 15% =
9. 9.240 increased by 10% =
10. 10.320 increased by 35% =
11. 11.62 increased by 50% =
12. 12.60 decreased by 15% =
13. 13.545 increased by 60% =
14. 14.800 increased by 5% =
15. 15.728 decreased by 25% =
16. 16.688 decreased by 25% =
17. 17.720 increased by 30% =
18. 18.220 decreased by 15% =
19. 19.60 decreased by 15% =
20. 20.570 increased by 10% =
21. 21.75 increased by 12% =
22. 22.160 increased by 10% =
23. 23.180 decreased by 15% =
24. 24.310 increased by 20% =
25. 25.290 decreased by 40% =
26. 26.152 decreased by 75% =
27. 27.88 decreased by 25% =
28. 28.560 increased by 5% =
29. 29.550 increased by 8% =
30. 30.85 decreased by 20% =
31. 31.440 increased by 5% =
32. 32.196 decreased by 25% =
33. 33.600 decreased by 8% =
34. 34.140 increased by 15% =
35. 35.380 increased by 35% =
36. 36.270 decreased by 40% =
37. 37.620 increased by 5% =
38. 38.410 decreased by 30% =
39. 39.385 increased by 20% =
40. 40.645 increased by 20% =

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