Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 929 · 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. 1.704 increased by 25% =
2. 2.235 increased by 20% =
3. 3.135 increased by 20% =
4. 4.640 increased by 35% =
5. 5.250 increased by 30% =
6. 6.325 decreased by 8% =
7. 7.156 increased by 25% =
8. 8.390 decreased by 10% =
9. 9.130 decreased by 30% =
10. 10.780 increased by 5% =
11. 11.450 increased by 30% =
12. 12.295 decreased by 40% =
13. 13.480 increased by 15% =
14. 14.200 decreased by 5% =
15. 15.150 increased by 8% =
16. 16.760 increased by 10% =
17. 17.620 decreased by 15% =
18. 18.260 increased by 60% =
19. 19.380 decreased by 40% =
20. 20.650 decreased by 30% =
21. 21.140 decreased by 35% =
22. 22.610 increased by 30% =
23. 23.420 increased by 5% =
24. 24.285 increased by 60% =
25. 25.584 increased by 50% =
26. 26.595 decreased by 20% =
27. 27.112 increased by 50% =
28. 28.755 increased by 20% =
29. 29.660 increased by 10% =
30. 30.250 increased by 60% =
31. 31.425 increased by 60% =
32. 32.300 increased by 15% =
33. 33.220 decreased by 15% =
34. 34.170 decreased by 40% =
35. 35.345 decreased by 40% =
36. 36.445 decreased by 60% =
37. 37.210 decreased by 40% =
38. 38.556 increased by 50% =
39. 39.688 increased by 25% =
40. 40.665 decreased by 20% =

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