Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 315 · 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. 1.420 increased by 5% =
2. 2.325 increased by 8% =
3. 3.330 increased by 40% =
4. 4.160 increased by 35% =
5. 5.260 increased by 30% =
6. 6.40 increased by 15% =
7. 7.55 increased by 60% =
8. 8.180 increased by 10% =
9. 9.600 decreased by 12% =
10. 10.270 decreased by 60% =
11. 11.240 increased by 35% =
12. 12.332 increased by 25% =
13. 13.680 increased by 10% =
14. 14.672 increased by 75% =
15. 15.752 increased by 25% =
16. 16.230 decreased by 10% =
17. 17.660 decreased by 30% =
18. 18.240 increased by 10% =
19. 19.750 decreased by 12% =
20. 20.625 increased by 8% =
21. 21.84 increased by 25% =
22. 22.90 increased by 50% =
23. 23.340 increased by 5% =
24. 24.610 increased by 10% =
25. 25.390 decreased by 30% =
26. 26.220 increased by 50% =
27. 27.724 decreased by 25% =
28. 28.225 increased by 12% =
29. 29.500 decreased by 5% =
30. 30.60 increased by 5% =
31. 31.620 increased by 40% =
32. 32.520 decreased by 40% =
33. 33.130 increased by 10% =
34. 34.95 increased by 40% =
35. 35.450 increased by 30% =
36. 36.275 increased by 8% =
37. 37.500 increased by 60% =
38. 38.140 decreased by 60% =
39. 39.150 increased by 12% =
40. 40.84 decreased by 75% =

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