Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 994 · 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. 1.548 increased by 50% =
2. 2.540 increased by 5% =
3. 3.500 increased by 75% =
4. 4.400 decreased by 15% =
5. 5.145 increased by 20% =
6. 6.70 decreased by 20% =
7. 7.140 decreased by 30% =
8. 8.710 decreased by 30% =
9. 9.132 decreased by 25% =
10. 10.260 increased by 35% =
11. 11.275 increased by 12% =
12. 12.270 decreased by 10% =
13. 13.250 decreased by 10% =
14. 14.310 increased by 30% =
15. 15.440 increased by 75% =
16. 16.660 decreased by 25% =
17. 17.228 decreased by 75% =
18. 18.310 increased by 10% =
19. 19.290 increased by 20% =
20. 20.500 decreased by 5% =
21. 21.440 increased by 35% =
22. 22.375 increased by 8% =
23. 23.75 decreased by 12% =
24. 24.320 increased by 5% =
25. 25.336 increased by 50% =
26. 26.60 increased by 20% =
27. 27.772 decreased by 25% =
28. 28.696 decreased by 75% =
29. 29.365 decreased by 60% =
30. 30.240 decreased by 20% =
31. 31.560 increased by 20% =
32. 32.450 increased by 10% =
33. 33.40 decreased by 10% =
34. 34.630 increased by 20% =
35. 35.640 increased by 15% =
36. 36.100 decreased by 15% =
37. 37.350 increased by 8% =
38. 38.684 decreased by 50% =
39. 39.700 increased by 10% =
40. 40.300 decreased by 8% =

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