Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 394 · 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. 1.100 decreased by 5% =
2. 2.740 increased by 35% =
3. 3.65 increased by 20% =
4. 4.460 decreased by 30% =
5. 5.240 decreased by 10% =
6. 6.686 decreased by 50% =
7. 7.40 increased by 35% =
8. 8.188 decreased by 25% =
9. 9.172 decreased by 25% =
10. 10.260 decreased by 20% =
11. 11.788 increased by 75% =
12. 12.220 decreased by 5% =
13. 13.600 increased by 20% =
14. 14.790 decreased by 40% =
15. 15.500 increased by 12% =
16. 16.80 decreased by 30% =
17. 17.750 increased by 12% =
18. 18.90 decreased by 40% =
19. 19.725 increased by 8% =
20. 20.550 decreased by 10% =
21. 21.50 increased by 30% =
22. 22.150 increased by 20% =
23. 23.440 increased by 40% =
24. 24.475 increased by 8% =
25. 25.340 increased by 35% =
26. 26.425 increased by 12% =
27. 27.520 increased by 5% =
28. 28.765 increased by 20% =
29. 29.360 increased by 30% =
30. 30.260 increased by 10% =
31. 31.200 increased by 8% =
32. 32.125 decreased by 8% =
33. 33.310 decreased by 10% =
34. 34.70 increased by 60% =
35. 35.495 increased by 60% =
36. 36.650 increased by 8% =
37. 37.450 increased by 50% =
38. 38.336 decreased by 75% =
39. 39.684 decreased by 75% =
40. 40.395 decreased by 20% =

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