Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 947 · 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. 1.244 increased by 25% =
2. 2.585 increased by 40% =
3. 3.320 increased by 15% =
4. 4.100 increased by 20% =
5. 5.180 decreased by 35% =
6. 6.225 decreased by 8% =
7. 7.435 decreased by 60% =
8. 8.640 decreased by 10% =
9. 9.460 increased by 35% =
10. 10.160 increased by 30% =
11. 11.375 increased by 60% =
12. 12.545 decreased by 20% =
13. 13.515 increased by 20% =
14. 14.555 increased by 20% =
15. 15.75 increased by 8% =
16. 16.125 increased by 12% =
17. 17.680 decreased by 5% =
18. 18.150 increased by 10% =
19. 19.200 decreased by 5% =
20. 20.600 decreased by 10% =
21. 21.70 decreased by 20% =
22. 22.650 decreased by 60% =
23. 23.600 increased by 40% =
24. 24.252 decreased by 50% =
25. 25.640 decreased by 15% =
26. 26.570 decreased by 60% =
27. 27.40 increased by 50% =
28. 28.625 increased by 8% =
29. 29.300 decreased by 5% =
30. 30.410 decreased by 10% =
31. 31.332 increased by 75% =
32. 32.200 increased by 35% =
33. 33.700 increased by 15% =
34. 34.310 increased by 10% =
35. 35.425 increased by 20% =
36. 36.700 decreased by 5% =
37. 37.440 decreased by 20% =
38. 38.670 increased by 30% =
39. 39.180 decreased by 10% =
40. 40.600 increased by 35% =

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