Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 614 · 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. 1.640 increased by 15% =
2. 2.264 decreased by 75% =
3. 3.245 decreased by 40% =
4. 4.180 increased by 15% =
5. 5.760 decreased by 60% =
6. 6.588 increased by 75% =
7. 7.456 decreased by 75% =
8. 8.300 increased by 5% =
9. 9.300 increased by 35% =
10. 10.160 decreased by 10% =
11. 11.620 increased by 5% =
12. 12.650 increased by 30% =
13. 13.130 decreased by 20% =
14. 14.740 increased by 5% =
15. 15.670 decreased by 10% =
16. 16.240 increased by 15% =
17. 17.475 decreased by 12% =
18. 18.320 increased by 35% =
19. 19.300 increased by 5% =
20. 20.120 decreased by 15% =
21. 21.385 increased by 40% =
22. 22.556 increased by 75% =
23. 23.224 decreased by 25% =
24. 24.500 increased by 30% =
25. 25.224 decreased by 75% =
26. 26.320 increased by 5% =
27. 27.202 decreased by 50% =
28. 28.404 decreased by 75% =
29. 29.500 decreased by 35% =
30. 30.760 decreased by 75% =
31. 31.90 increased by 30% =
32. 32.795 increased by 60% =
33. 33.440 increased by 75% =
34. 34.224 decreased by 25% =
35. 35.40 decreased by 10% =
36. 36.565 decreased by 40% =
37. 37.420 decreased by 40% =
38. 38.136 increased by 25% =
39. 39.650 decreased by 8% =
40. 40.500 increased by 8% =

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