Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 343 · 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. 1.125 increased by 8% =
2. 2.376 decreased by 25% =
3. 3.716 increased by 25% =
4. 4.80 increased by 10% =
5. 5.200 increased by 5% =
6. 6.610 decreased by 20% =
7. 7.80 decreased by 35% =
8. 8.420 decreased by 35% =
9. 9.370 increased by 20% =
10. 10.800 decreased by 8% =
11. 11.180 decreased by 5% =
12. 12.160 increased by 15% =
13. 13.460 increased by 5% =
14. 14.332 increased by 25% =
15. 15.220 increased by 40% =
16. 16.540 decreased by 5% =
17. 17.104 decreased by 75% =
18. 18.260 decreased by 15% =
19. 19.180 increased by 15% =
20. 20.710 increased by 40% =
21. 21.720 decreased by 15% =
22. 22.264 decreased by 50% =
23. 23.725 increased by 12% =
24. 24.350 decreased by 8% =
25. 25.168 decreased by 50% =
26. 26.225 increased by 8% =
27. 27.665 increased by 40% =
28. 28.525 decreased by 60% =
29. 29.420 increased by 35% =
30. 30.300 increased by 5% =
31. 31.420 decreased by 40% =
32. 32.168 increased by 50% =
33. 33.525 increased by 8% =
34. 34.100 decreased by 30% =
35. 35.60 decreased by 25% =
36. 36.600 decreased by 5% =
37. 37.460 decreased by 75% =
38. 38.380 decreased by 20% =
39. 39.370 decreased by 10% =
40. 40.275 increased by 20% =

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