Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 96 · 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. 1.688 decreased by 75% =
2. 2.456 decreased by 25% =
3. 3.580 increased by 35% =
4. 4.120 decreased by 15% =
5. 5.60 decreased by 35% =
6. 6.775 increased by 8% =
7. 7.150 decreased by 10% =
8. 8.620 increased by 5% =
9. 9.780 increased by 35% =
10. 10.765 decreased by 20% =
11. 11.710 increased by 10% =
12. 12.220 decreased by 10% =
13. 13.375 decreased by 8% =
14. 14.148 increased by 25% =
15. 15.445 decreased by 60% =
16. 16.248 decreased by 50% =
17. 17.656 increased by 75% =
18. 18.460 increased by 40% =
19. 19.360 increased by 25% =
20. 20.108 decreased by 75% =
21. 21.168 increased by 25% =
22. 22.620 decreased by 25% =
23. 23.410 decreased by 60% =
24. 24.465 increased by 60% =
25. 25.500 decreased by 30% =
26. 26.385 decreased by 40% =
27. 27.375 decreased by 8% =
28. 28.355 decreased by 60% =
29. 29.720 increased by 30% =
30. 30.340 increased by 15% =
31. 31.200 increased by 8% =
32. 32.350 decreased by 60% =
33. 33.635 decreased by 40% =
34. 34.640 decreased by 15% =
35. 35.150 increased by 30% =
36. 36.440 decreased by 10% =
37. 37.120 decreased by 40% =
38. 38.480 decreased by 30% =
39. 39.520 decreased by 5% =
40. 40.740 increased by 35% =

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