Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 484 · 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. 1.800 increased by 35% =
2. 2.175 increased by 8% =
3. 3.75 decreased by 60% =
4. 4.315 increased by 20% =
5. 5.300 decreased by 5% =
6. 6.380 decreased by 5% =
7. 7.200 increased by 8% =
8. 8.370 increased by 60% =
9. 9.375 decreased by 8% =
10. 10.780 increased by 15% =
11. 11.300 increased by 10% =
12. 12.420 increased by 5% =
13. 13.470 decreased by 50% =
14. 14.240 decreased by 15% =
15. 15.340 increased by 20% =
16. 16.500 decreased by 12% =
17. 17.600 increased by 35% =
18. 18.580 increased by 5% =
19. 19.180 increased by 10% =
20. 20.48 decreased by 25% =
21. 21.775 decreased by 20% =
22. 22.240 increased by 60% =
23. 23.360 increased by 40% =
24. 24.450 increased by 20% =
25. 25.750 increased by 8% =
26. 26.316 decreased by 25% =
27. 27.40 increased by 35% =
28. 28.170 increased by 60% =
29. 29.790 increased by 10% =
30. 30.144 decreased by 75% =
31. 31.690 decreased by 10% =
32. 32.365 decreased by 60% =
33. 33.675 decreased by 12% =
34. 34.400 decreased by 8% =
35. 35.160 decreased by 60% =
36. 36.144 increased by 25% =
37. 37.100 increased by 5% =
38. 38.352 increased by 75% =
39. 39.620 increased by 15% =
40. 40.600 decreased by 8% =

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