Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 699 · 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. 1.70 increased by 60% =
2. 2.580 decreased by 20% =
3. 3.330 increased by 60% =
4. 4.410 increased by 10% =
5. 5.665 increased by 60% =
6. 6.750 decreased by 12% =
7. 7.384 decreased by 25% =
8. 8.475 decreased by 8% =
9. 9.720 increased by 40% =
10. 10.70 increased by 50% =
11. 11.185 decreased by 60% =
12. 12.265 decreased by 40% =
13. 13.288 increased by 25% =
14. 14.300 increased by 5% =
15. 15.45 decreased by 20% =
16. 16.40 decreased by 5% =
17. 17.220 increased by 15% =
18. 18.105 increased by 60% =
19. 19.488 increased by 25% =
20. 20.436 decreased by 50% =
21. 21.420 increased by 5% =
22. 22.105 increased by 40% =
23. 23.215 increased by 20% =
24. 24.160 increased by 15% =
25. 25.260 decreased by 40% =
26. 26.720 decreased by 15% =
27. 27.400 increased by 35% =
28. 28.440 decreased by 20% =
29. 29.720 decreased by 35% =
30. 30.760 increased by 30% =
31. 31.700 increased by 15% =
32. 32.220 increased by 10% =
33. 33.775 increased by 12% =
34. 34.420 increased by 10% =
35. 35.570 increased by 10% =
36. 36.550 decreased by 10% =
37. 37.370 decreased by 20% =
38. 38.790 increased by 60% =
39. 39.620 decreased by 15% =
40. 40.370 decreased by 40% =

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