Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 877 · 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. 1.780 decreased by 5% =
2. 2.480 increased by 40% =
3. 3.650 decreased by 8% =
4. 4.342 increased by 50% =
5. 5.80 increased by 60% =
6. 6.740 decreased by 60% =
7. 7.165 decreased by 40% =
8. 8.730 increased by 10% =
9. 9.666 increased by 50% =
10. 10.640 decreased by 5% =
11. 11.580 increased by 5% =
12. 12.450 decreased by 12% =
13. 13.700 decreased by 10% =
14. 14.660 decreased by 35% =
15. 15.752 decreased by 75% =
16. 16.272 increased by 25% =
17. 17.270 increased by 10% =
18. 18.200 increased by 15% =
19. 19.325 increased by 12% =
20. 20.300 decreased by 30% =
21. 21.725 increased by 20% =
22. 22.710 increased by 20% =
23. 23.80 decreased by 20% =
24. 24.632 decreased by 50% =
25. 25.710 decreased by 10% =
26. 26.600 increased by 12% =
27. 27.480 decreased by 5% =
28. 28.340 increased by 5% =
29. 29.170 decreased by 60% =
30. 30.475 increased by 12% =
31. 31.375 increased by 12% =
32. 32.380 increased by 15% =
33. 33.430 increased by 60% =
34. 34.375 increased by 20% =
35. 35.620 decreased by 15% =
36. 36.150 increased by 8% =
37. 37.600 increased by 15% =
38. 38.750 increased by 30% =
39. 39.180 decreased by 10% =
40. 40.268 increased by 50% =

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