Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 298 · 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. 1.540 increased by 40% =
2. 2.252 increased by 75% =
3. 3.244 decreased by 25% =
4. 4.430 increased by 40% =
5. 5.300 decreased by 8% =
6. 6.180 decreased by 75% =
7. 7.650 increased by 40% =
8. 8.50 increased by 12% =
9. 9.360 decreased by 35% =
10. 10.110 increased by 50% =
11. 11.180 increased by 15% =
12. 12.610 increased by 60% =
13. 13.575 increased by 8% =
14. 14.128 decreased by 25% =
15. 15.200 decreased by 8% =
16. 16.215 increased by 60% =
17. 17.640 increased by 10% =
18. 18.780 increased by 40% =
19. 19.130 decreased by 40% =
20. 20.536 decreased by 75% =
21. 21.60 increased by 5% =
22. 22.220 increased by 5% =
23. 23.458 decreased by 50% =
24. 24.250 increased by 10% =
25. 25.685 increased by 60% =
26. 26.800 increased by 8% =
27. 27.750 increased by 8% =
28. 28.65 decreased by 40% =
29. 29.620 increased by 35% =
30. 30.260 increased by 5% =
31. 31.85 decreased by 20% =
32. 32.460 decreased by 35% =
33. 33.200 decreased by 40% =
34. 34.60 decreased by 10% =
35. 35.360 decreased by 5% =
36. 36.108 decreased by 75% =
37. 37.800 increased by 10% =
38. 38.795 decreased by 40% =
39. 39.556 decreased by 25% =
40. 40.520 decreased by 10% =

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