Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 703 · 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. 1.800 decreased by 5% =
2. 2.400 increased by 10% =
3. 3.450 increased by 12% =
4. 4.420 increased by 75% =
5. 5.600 decreased by 10% =
6. 6.525 increased by 8% =
7. 7.265 increased by 60% =
8. 8.275 increased by 8% =
9. 9.750 increased by 12% =
10. 10.420 increased by 30% =
11. 11.400 increased by 20% =
12. 12.325 decreased by 8% =
13. 13.392 increased by 75% =
14. 14.260 decreased by 40% =
15. 15.500 decreased by 15% =
16. 16.550 increased by 50% =
17. 17.796 increased by 75% =
18. 18.696 decreased by 50% =
19. 19.270 increased by 30% =
20. 20.600 increased by 5% =
21. 21.330 increased by 40% =
22. 22.590 increased by 30% =
23. 23.724 increased by 75% =
24. 24.560 decreased by 40% =
25. 25.220 increased by 5% =
26. 26.415 decreased by 60% =
27. 27.460 increased by 5% =
28. 28.320 decreased by 35% =
29. 29.260 increased by 5% =
30. 30.110 increased by 30% =
31. 31.294 increased by 50% =
32. 32.210 increased by 10% =
33. 33.240 increased by 35% =
34. 34.300 decreased by 5% =
35. 35.560 increased by 15% =
36. 36.600 increased by 12% =
37. 37.220 increased by 10% =
38. 38.744 decreased by 25% =
39. 39.650 decreased by 10% =
40. 40.592 increased by 75% =

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