Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 118 · 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. 1.360 increased by 15% =
2. 2.180 increased by 35% =
3. 3.580 decreased by 60% =
4. 4.460 increased by 10% =
5. 5.105 decreased by 20% =
6. 6.60 increased by 5% =
7. 7.580 decreased by 35% =
8. 8.150 increased by 8% =
9. 9.545 increased by 20% =
10. 10.60 decreased by 10% =
11. 11.372 decreased by 25% =
12. 12.200 increased by 30% =
13. 13.460 increased by 40% =
14. 14.625 increased by 8% =
15. 15.172 increased by 75% =
16. 16.730 increased by 10% =
17. 17.264 increased by 75% =
18. 18.40 increased by 15% =
19. 19.750 increased by 10% =
20. 20.230 decreased by 40% =
21. 21.390 decreased by 10% =
22. 22.275 increased by 12% =
23. 23.140 decreased by 40% =
24. 24.662 increased by 50% =
25. 25.248 increased by 75% =
26. 26.712 increased by 75% =
27. 27.310 increased by 60% =
28. 28.144 increased by 25% =
29. 29.200 increased by 8% =
30. 30.220 decreased by 15% =
31. 31.240 decreased by 10% =
32. 32.580 decreased by 10% =
33. 33.650 increased by 10% =
34. 34.540 decreased by 40% =
35. 35.280 decreased by 5% =
36. 36.145 increased by 20% =
37. 37.104 increased by 25% =
38. 38.740 increased by 15% =
39. 39.325 decreased by 12% =
40. 40.428 increased by 50% =

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