Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 890 · 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. 1.40 decreased by 15% =
2. 2.752 increased by 25% =
3. 3.270 decreased by 50% =
4. 4.260 increased by 15% =
5. 5.635 decreased by 20% =
6. 6.225 increased by 8% =
7. 7.64 decreased by 50% =
8. 8.160 decreased by 35% =
9. 9.620 increased by 15% =
10. 10.565 decreased by 20% =
11. 11.730 decreased by 10% =
12. 12.275 increased by 40% =
13. 13.76 increased by 75% =
14. 14.96 decreased by 75% =
15. 15.580 decreased by 15% =
16. 16.600 increased by 12% =
17. 17.360 increased by 5% =
18. 18.644 decreased by 25% =
19. 19.576 increased by 25% =
20. 20.444 increased by 25% =
21. 21.525 increased by 12% =
22. 22.288 decreased by 75% =
23. 23.560 decreased by 30% =
24. 24.600 increased by 10% =
25. 25.302 decreased by 50% =
26. 26.488 increased by 25% =
27. 27.490 increased by 30% =
28. 28.795 decreased by 20% =
29. 29.625 decreased by 12% =
30. 30.350 increased by 50% =
31. 31.210 decreased by 10% =
32. 32.220 decreased by 35% =
33. 33.206 decreased by 50% =
34. 34.340 decreased by 30% =
35. 35.85 decreased by 20% =
36. 36.740 increased by 50% =
37. 37.225 decreased by 8% =
38. 38.740 increased by 15% =
39. 39.72 increased by 25% =
40. 40.175 increased by 8% =

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