Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 744 · 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. 1.250 decreased by 50% =
2. 2.360 increased by 15% =
3. 3.240 decreased by 35% =
4. 4.144 increased by 25% =
5. 5.205 decreased by 60% =
6. 6.500 decreased by 12% =
7. 7.70 decreased by 20% =
8. 8.196 increased by 75% =
9. 9.316 increased by 25% =
10. 10.774 increased by 50% =
11. 11.450 increased by 12% =
12. 12.60 increased by 35% =
13. 13.316 decreased by 75% =
14. 14.260 decreased by 10% =
15. 15.590 increased by 40% =
16. 16.750 increased by 20% =
17. 17.558 increased by 50% =
18. 18.796 increased by 25% =
19. 19.162 decreased by 50% =
20. 20.310 increased by 10% =
21. 21.260 increased by 15% =
22. 22.160 decreased by 10% =
23. 23.440 increased by 30% =
24. 24.524 decreased by 25% =
25. 25.275 increased by 8% =
26. 26.392 decreased by 25% =
27. 27.725 increased by 8% =
28. 28.144 decreased by 75% =
29. 29.240 increased by 10% =
30. 30.150 decreased by 12% =
31. 31.430 increased by 30% =
32. 32.600 increased by 15% =
33. 33.776 increased by 25% =
34. 34.75 increased by 8% =
35. 35.144 decreased by 75% =
36. 36.150 decreased by 12% =
37. 37.124 decreased by 75% =
38. 38.75 increased by 12% =
39. 39.700 increased by 60% =
40. 40.390 increased by 30% =

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