Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 167 · 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. 1.736 increased by 50% =
2. 2.205 decreased by 20% =
3. 3.280 increased by 35% =
4. 4.440 increased by 5% =
5. 5.640 increased by 15% =
6. 6.460 increased by 35% =
7. 7.402 increased by 50% =
8. 8.720 increased by 15% =
9. 9.640 increased by 5% =
10. 10.600 increased by 40% =
11. 11.420 increased by 5% =
12. 12.200 increased by 35% =
13. 13.280 decreased by 60% =
14. 14.160 increased by 30% =
15. 15.285 increased by 20% =
16. 16.408 increased by 50% =
17. 17.790 increased by 40% =
18. 18.740 increased by 35% =
19. 19.160 increased by 20% =
20. 20.150 increased by 8% =
21. 21.460 decreased by 35% =
22. 22.772 decreased by 25% =
23. 23.800 increased by 15% =
24. 24.315 increased by 40% =
25. 25.612 decreased by 75% =
26. 26.800 decreased by 5% =
27. 27.120 decreased by 15% =
28. 28.300 decreased by 5% =
29. 29.320 increased by 15% =
30. 30.160 decreased by 5% =
31. 31.160 decreased by 5% =
32. 32.800 increased by 30% =
33. 33.132 increased by 50% =
34. 34.430 decreased by 40% =
35. 35.530 increased by 30% =
36. 36.640 decreased by 10% =
37. 37.660 decreased by 35% =
38. 38.110 decreased by 30% =
39. 39.800 increased by 60% =
40. 40.205 decreased by 60% =

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