Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 248 · 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. 1.175 increased by 8% =
2. 2.250 increased by 12% =
3. 3.60 increased by 50% =
4. 4.670 decreased by 30% =
5. 5.420 increased by 15% =
6. 6.50 decreased by 8% =
7. 7.150 increased by 30% =
8. 8.180 decreased by 20% =
9. 9.80 decreased by 30% =
10. 10.725 decreased by 40% =
11. 11.80 increased by 35% =
12. 12.800 increased by 20% =
13. 13.400 increased by 15% =
14. 14.720 increased by 5% =
15. 15.68 decreased by 25% =
16. 16.180 decreased by 30% =
17. 17.320 decreased by 20% =
18. 18.570 decreased by 20% =
19. 19.525 decreased by 40% =
20. 20.260 increased by 35% =
21. 21.460 decreased by 5% =
22. 22.130 increased by 10% =
23. 23.660 decreased by 15% =
24. 24.100 increased by 12% =
25. 25.120 increased by 35% =
26. 26.80 increased by 5% =
27. 27.265 increased by 40% =
28. 28.750 decreased by 60% =
29. 29.96 increased by 25% =
30. 30.605 decreased by 40% =
31. 31.192 decreased by 25% =
32. 32.240 decreased by 15% =
33. 33.780 increased by 5% =
34. 34.560 increased by 20% =
35. 35.125 increased by 8% =
36. 36.550 decreased by 8% =
37. 37.160 increased by 5% =
38. 38.265 increased by 40% =
39. 39.594 decreased by 50% =
40. 40.752 increased by 25% =

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