Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 289 · 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. 1.60 increased by 50% =
2. 2.100 increased by 12% =
3. 3.275 increased by 8% =
4. 4.576 decreased by 75% =
5. 5.680 decreased by 5% =
6. 6.770 decreased by 60% =
7. 7.62 decreased by 50% =
8. 8.225 increased by 8% =
9. 9.450 increased by 12% =
10. 10.100 increased by 35% =
11. 11.600 increased by 8% =
12. 12.425 decreased by 8% =
13. 13.392 decreased by 50% =
14. 14.275 increased by 8% =
15. 15.202 increased by 50% =
16. 16.300 decreased by 25% =
17. 17.750 increased by 30% =
18. 18.240 increased by 60% =
19. 19.430 increased by 60% =
20. 20.220 decreased by 15% =
21. 21.520 increased by 15% =
22. 22.600 increased by 12% =
23. 23.630 decreased by 20% =
24. 24.720 increased by 35% =
25. 25.738 increased by 50% =
26. 26.148 increased by 50% =
27. 27.40 decreased by 60% =
28. 28.484 increased by 75% =
29. 29.55 decreased by 40% =
30. 30.40 decreased by 35% =
31. 31.110 decreased by 10% =
32. 32.675 increased by 12% =
33. 33.80 decreased by 20% =
34. 34.232 increased by 75% =
35. 35.200 decreased by 15% =
36. 36.265 increased by 20% =
37. 37.244 increased by 75% =
38. 38.256 decreased by 75% =
39. 39.780 decreased by 15% =
40. 40.760 increased by 15% =

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