Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 303 · 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. 1.325 increased by 12% =
2. 2.244 decreased by 75% =
3. 3.395 increased by 20% =
4. 4.300 increased by 50% =
5. 5.764 increased by 25% =
6. 6.708 decreased by 75% =
7. 7.175 decreased by 12% =
8. 8.425 decreased by 20% =
9. 9.285 increased by 40% =
10. 10.560 decreased by 25% =
11. 11.520 increased by 15% =
12. 12.320 increased by 5% =
13. 13.500 decreased by 8% =
14. 14.40 increased by 60% =
15. 15.785 increased by 60% =
16. 16.720 decreased by 15% =
17. 17.500 increased by 10% =
18. 18.40 decreased by 10% =
19. 19.240 increased by 15% =
20. 20.180 decreased by 10% =
21. 21.80 increased by 15% =
22. 22.715 decreased by 20% =
23. 23.40 increased by 15% =
24. 24.320 decreased by 50% =
25. 25.322 increased by 50% =
26. 26.760 decreased by 5% =
27. 27.100 increased by 10% =
28. 28.780 decreased by 15% =
29. 29.580 increased by 15% =
30. 30.388 decreased by 25% =
31. 31.540 increased by 10% =
32. 32.715 decreased by 40% =
33. 33.286 increased by 50% =
34. 34.280 increased by 20% =
35. 35.560 decreased by 15% =
36. 36.630 increased by 20% =
37. 37.460 decreased by 15% =
38. 38.800 increased by 8% =
39. 39.700 increased by 8% =
40. 40.568 decreased by 75% =

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