Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 451 · 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. 1.476 increased by 50% =
2. 2.472 decreased by 75% =
3. 3.175 increased by 12% =
4. 4.654 increased by 50% =
5. 5.65 increased by 60% =
6. 6.575 increased by 40% =
7. 7.336 increased by 50% =
8. 8.620 increased by 10% =
9. 9.650 increased by 8% =
10. 10.582 increased by 50% =
11. 11.625 decreased by 8% =
12. 12.440 decreased by 10% =
13. 13.40 decreased by 60% =
14. 14.430 decreased by 30% =
15. 15.364 increased by 50% =
16. 16.420 decreased by 35% =
17. 17.225 decreased by 8% =
18. 18.250 decreased by 30% =
19. 19.460 decreased by 15% =
20. 20.610 increased by 60% =
21. 21.380 increased by 15% =
22. 22.600 increased by 12% =
23. 23.425 decreased by 12% =
24. 24.600 decreased by 15% =
25. 25.480 increased by 5% =
26. 26.515 increased by 60% =
27. 27.385 decreased by 20% =
28. 28.215 decreased by 60% =
29. 29.300 decreased by 35% =
30. 30.200 decreased by 8% =
31. 31.480 increased by 35% =
32. 32.600 increased by 8% =
33. 33.465 increased by 40% =
34. 34.250 decreased by 10% =
35. 35.700 decreased by 8% =
36. 36.125 increased by 12% =
37. 37.795 decreased by 60% =
38. 38.380 increased by 15% =
39. 39.660 increased by 35% =
40. 40.125 decreased by 8% =

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