Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 181 · 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. 1.290 increased by 30% =
2. 2.300 increased by 25% =
3. 3.788 increased by 50% =
4. 4.675 increased by 8% =
5. 5.140 increased by 5% =
6. 6.580 decreased by 75% =
7. 7.540 increased by 15% =
8. 8.720 increased by 35% =
9. 9.350 decreased by 8% =
10. 10.150 decreased by 30% =
11. 11.595 increased by 40% =
12. 12.625 increased by 8% =
13. 13.396 decreased by 25% =
14. 14.320 decreased by 20% =
15. 15.280 decreased by 35% =
16. 16.720 decreased by 25% =
17. 17.238 decreased by 50% =
18. 18.492 increased by 75% =
19. 19.290 increased by 60% =
20. 20.760 increased by 35% =
21. 21.680 increased by 5% =
22. 22.200 decreased by 35% =
23. 23.50 increased by 20% =
24. 24.550 decreased by 40% =
25. 25.50 decreased by 8% =
26. 26.180 decreased by 35% =
27. 27.285 decreased by 60% =
28. 28.284 decreased by 75% =
29. 29.220 increased by 10% =
30. 30.568 increased by 75% =
31. 31.340 increased by 35% =
32. 32.245 increased by 20% =
33. 33.465 increased by 60% =
34. 34.628 increased by 50% =
35. 35.625 increased by 12% =
36. 36.590 increased by 20% =
37. 37.524 decreased by 25% =
38. 38.250 increased by 10% =
39. 39.80 increased by 5% =
40. 40.580 decreased by 35% =

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