Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 967 · 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. 1.704 increased by 25% =
2. 2.420 decreased by 5% =
3. 3.240 increased by 40% =
4. 4.210 increased by 60% =
5. 5.710 increased by 10% =
6. 6.784 decreased by 25% =
7. 7.700 decreased by 5% =
8. 8.450 increased by 30% =
9. 9.775 increased by 40% =
10. 10.380 decreased by 60% =
11. 11.232 decreased by 25% =
12. 12.636 increased by 75% =
13. 13.720 decreased by 15% =
14. 14.100 increased by 15% =
15. 15.320 increased by 5% =
16. 16.780 decreased by 10% =
17. 17.452 decreased by 75% =
18. 18.75 decreased by 8% =
19. 19.490 decreased by 60% =
20. 20.720 decreased by 30% =
21. 21.212 increased by 75% =
22. 22.284 increased by 25% =
23. 23.140 increased by 20% =
24. 24.285 increased by 20% =
25. 25.652 decreased by 25% =
26. 26.656 increased by 25% =
27. 27.536 decreased by 50% =
28. 28.350 decreased by 8% =
29. 29.200 increased by 5% =
30. 30.710 decreased by 30% =
31. 31.750 increased by 30% =
32. 32.520 decreased by 75% =
33. 33.130 decreased by 20% =
34. 34.400 increased by 5% =
35. 35.50 increased by 12% =
36. 36.125 increased by 8% =
37. 37.225 increased by 12% =
38. 38.40 decreased by 10% =
39. 39.736 increased by 75% =
40. 40.452 increased by 25% =

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