Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 258 · 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. 1.760 increased by 15% =
2. 2.480 increased by 5% =
3. 3.180 decreased by 35% =
4. 4.220 decreased by 30% =
5. 5.140 decreased by 5% =
6. 6.90 increased by 60% =
7. 7.112 decreased by 25% =
8. 8.620 increased by 35% =
9. 9.480 increased by 60% =
10. 10.740 increased by 10% =
11. 11.438 increased by 50% =
12. 12.50 decreased by 12% =
13. 13.650 increased by 50% =
14. 14.590 increased by 40% =
15. 15.240 decreased by 30% =
16. 16.780 increased by 75% =
17. 17.55 decreased by 20% =
18. 18.585 increased by 40% =
19. 19.310 increased by 10% =
20. 20.500 increased by 30% =
21. 21.680 increased by 50% =
22. 22.755 increased by 60% =
23. 23.480 increased by 15% =
24. 24.770 decreased by 50% =
25. 25.580 increased by 30% =
26. 26.50 increased by 50% =
27. 27.400 increased by 15% =
28. 28.130 decreased by 10% =
29. 29.130 increased by 10% =
30. 30.564 increased by 75% =
31. 31.325 decreased by 12% =
32. 32.476 decreased by 75% =
33. 33.256 increased by 25% =
34. 34.106 decreased by 50% =
35. 35.280 increased by 5% =
36. 36.665 increased by 60% =
37. 37.200 increased by 35% =
38. 38.280 increased by 40% =
39. 39.140 increased by 5% =
40. 40.440 decreased by 5% =

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