Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 383 · 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. 1.312 increased by 75% =
2. 2.295 decreased by 20% =
3. 3.350 decreased by 50% =
4. 4.395 decreased by 60% =
5. 5.325 increased by 12% =
6. 6.304 increased by 25% =
7. 7.130 increased by 10% =
8. 8.360 increased by 5% =
9. 9.200 increased by 60% =
10. 10.764 increased by 75% =
11. 11.324 decreased by 25% =
12. 12.555 increased by 40% =
13. 13.45 increased by 40% =
14. 14.345 increased by 40% =
15. 15.40 increased by 15% =
16. 16.470 increased by 10% =
17. 17.145 increased by 20% =
18. 18.68 decreased by 25% =
19. 19.720 decreased by 5% =
20. 20.44 increased by 25% =
21. 21.358 increased by 50% =
22. 22.760 increased by 5% =
23. 23.120 increased by 15% =
24. 24.180 decreased by 10% =
25. 25.124 decreased by 75% =
26. 26.280 decreased by 35% =
27. 27.604 increased by 75% =
28. 28.380 increased by 5% =
29. 29.550 decreased by 12% =
30. 30.300 decreased by 40% =
31. 31.280 decreased by 5% =
32. 32.260 decreased by 15% =
33. 33.180 decreased by 15% =
34. 34.650 increased by 10% =
35. 35.80 decreased by 60% =
36. 36.590 decreased by 10% =
37. 37.230 increased by 30% =
38. 38.450 increased by 60% =
39. 39.350 decreased by 10% =
40. 40.410 increased by 20% =

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