Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 262 · 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. 1.220 increased by 35% =
2. 2.360 increased by 5% =
3. 3.575 decreased by 12% =
4. 4.80 decreased by 5% =
5. 5.140 increased by 20% =
6. 6.445 decreased by 20% =
7. 7.130 increased by 40% =
8. 8.380 decreased by 35% =
9. 9.120 increased by 5% =
10. 10.280 increased by 40% =
11. 11.560 increased by 60% =
12. 12.280 decreased by 5% =
13. 13.160 decreased by 25% =
14. 14.440 increased by 40% =
15. 15.120 increased by 30% =
16. 16.710 decreased by 40% =
17. 17.530 decreased by 40% =
18. 18.700 decreased by 30% =
19. 19.296 decreased by 75% =
20. 20.640 increased by 10% =
21. 21.55 increased by 40% =
22. 22.172 increased by 50% =
23. 23.450 increased by 40% =
24. 24.125 decreased by 12% =
25. 25.160 decreased by 5% =
26. 26.720 increased by 35% =
27. 27.240 decreased by 15% =
28. 28.300 decreased by 35% =
29. 29.725 increased by 20% =
30. 30.64 decreased by 25% =
31. 31.525 decreased by 12% =
32. 32.60 increased by 15% =
33. 33.265 decreased by 40% =
34. 34.220 decreased by 5% =
35. 35.525 decreased by 8% =
36. 36.700 increased by 20% =
37. 37.760 decreased by 35% =
38. 38.255 increased by 40% =
39. 39.424 increased by 75% =
40. 40.228 increased by 25% =

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