Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 966 · 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. 1.470 increased by 40% =
2. 2.145 increased by 20% =
3. 3.370 increased by 40% =
4. 4.790 increased by 30% =
5. 5.328 increased by 25% =
6. 6.780 increased by 30% =
7. 7.490 decreased by 10% =
8. 8.460 decreased by 40% =
9. 9.740 increased by 35% =
10. 10.160 increased by 35% =
11. 11.360 increased by 30% =
12. 12.216 increased by 25% =
13. 13.620 decreased by 5% =
14. 14.120 decreased by 15% =
15. 15.675 increased by 8% =
16. 16.380 decreased by 5% =
17. 17.62 increased by 50% =
18. 18.375 decreased by 12% =
19. 19.285 increased by 60% =
20. 20.795 decreased by 60% =
21. 21.750 increased by 12% =
22. 22.560 increased by 5% =
23. 23.75 increased by 8% =
24. 24.465 decreased by 20% =
25. 25.210 decreased by 30% =
26. 26.740 increased by 10% =
27. 27.280 decreased by 10% =
28. 28.495 decreased by 60% =
29. 29.460 increased by 35% =
30. 30.400 decreased by 8% =
31. 31.340 decreased by 30% =
32. 32.235 decreased by 20% =
33. 33.210 increased by 40% =
34. 34.460 decreased by 30% =
35. 35.84 increased by 75% =
36. 36.620 decreased by 15% =
37. 37.360 increased by 75% =
38. 38.105 decreased by 20% =
39. 39.110 decreased by 20% =
40. 40.40 increased by 15% =

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