Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 886 · 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. 1.400 increased by 8% =
2. 2.214 increased by 50% =
3. 3.280 decreased by 30% =
4. 4.550 decreased by 8% =
5. 5.250 decreased by 12% =
6. 6.525 decreased by 60% =
7. 7.120 increased by 50% =
8. 8.260 increased by 35% =
9. 9.800 decreased by 8% =
10. 10.700 increased by 12% =
11. 11.690 decreased by 30% =
12. 12.184 increased by 25% =
13. 13.100 increased by 8% =
14. 14.715 increased by 60% =
15. 15.140 increased by 15% =
16. 16.800 increased by 30% =
17. 17.575 increased by 8% =
18. 18.800 decreased by 8% =
19. 19.300 decreased by 10% =
20. 20.580 decreased by 5% =
21. 21.130 increased by 40% =
22. 22.340 increased by 10% =
23. 23.725 increased by 40% =
24. 24.644 decreased by 75% =
25. 25.740 decreased by 5% =
26. 26.650 increased by 20% =
27. 27.790 decreased by 20% =
28. 28.590 increased by 10% =
29. 29.275 increased by 12% =
30. 30.380 decreased by 35% =
31. 31.400 decreased by 35% =
32. 32.440 decreased by 5% =
33. 33.280 decreased by 35% =
34. 34.220 increased by 35% =
35. 35.450 increased by 12% =
36. 36.116 decreased by 75% =
37. 37.550 increased by 50% =
38. 38.552 increased by 25% =
39. 39.572 increased by 50% =
40. 40.750 increased by 60% =

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