Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 488 · 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. 1.520 increased by 5% =
2. 2.292 decreased by 75% =
3. 3.465 increased by 20% =
4. 4.790 increased by 30% =
5. 5.160 increased by 5% =
6. 6.780 decreased by 60% =
7. 7.630 increased by 20% =
8. 8.800 increased by 12% =
9. 9.388 increased by 75% =
10. 10.178 increased by 50% =
11. 11.265 decreased by 40% =
12. 12.650 decreased by 10% =
13. 13.600 decreased by 10% =
14. 14.45 increased by 20% =
15. 15.40 decreased by 5% =
16. 16.500 decreased by 15% =
17. 17.654 decreased by 50% =
18. 18.40 increased by 75% =
19. 19.542 decreased by 50% =
20. 20.420 increased by 20% =
21. 21.136 decreased by 25% =
22. 22.115 decreased by 40% =
23. 23.788 decreased by 25% =
24. 24.600 decreased by 30% =
25. 25.720 increased by 15% =
26. 26.216 decreased by 75% =
27. 27.630 decreased by 20% =
28. 28.540 increased by 15% =
29. 29.180 increased by 50% =
30. 30.770 decreased by 20% =
31. 31.200 decreased by 5% =
32. 32.330 decreased by 20% =
33. 33.475 increased by 20% =
34. 34.550 increased by 30% =
35. 35.220 increased by 15% =
36. 36.400 decreased by 30% =
37. 37.440 increased by 50% =
38. 38.430 decreased by 60% =
39. 39.732 increased by 50% =
40. 40.450 decreased by 12% =

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