Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 157 · 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. 1.160 increased by 5% =
2. 2.132 increased by 75% =
3. 3.124 increased by 75% =
4. 4.512 decreased by 75% =
5. 5.730 decreased by 20% =
6. 6.772 increased by 75% =
7. 7.60 decreased by 35% =
8. 8.660 increased by 15% =
9. 9.275 decreased by 40% =
10. 10.428 decreased by 75% =
11. 11.248 decreased by 25% =
12. 12.396 increased by 25% =
13. 13.176 increased by 75% =
14. 14.290 increased by 20% =
15. 15.345 increased by 60% =
16. 16.370 increased by 30% =
17. 17.300 increased by 12% =
18. 18.196 decreased by 25% =
19. 19.120 increased by 20% =
20. 20.420 decreased by 60% =
21. 21.120 increased by 15% =
22. 22.300 decreased by 5% =
23. 23.108 increased by 75% =
24. 24.720 decreased by 30% =
25. 25.250 decreased by 8% =
26. 26.756 decreased by 50% =
27. 27.625 decreased by 12% =
28. 28.280 increased by 15% =
29. 29.260 increased by 15% =
30. 30.250 decreased by 8% =
31. 31.518 decreased by 50% =
32. 32.690 increased by 60% =
33. 33.236 increased by 50% =
34. 34.130 decreased by 30% =
35. 35.760 increased by 35% =
36. 36.560 decreased by 5% =
37. 37.315 increased by 40% =
38. 38.590 increased by 10% =
39. 39.460 increased by 10% =
40. 40.275 increased by 12% =

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