Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 839 · 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. 1.255 decreased by 60% =
2. 2.70 increased by 60% =
3. 3.225 decreased by 20% =
4. 4.270 increased by 10% =
5. 5.164 decreased by 25% =
6. 6.280 increased by 30% =
7. 7.515 decreased by 20% =
8. 8.500 increased by 8% =
9. 9.75 decreased by 8% =
10. 10.720 increased by 25% =
11. 11.400 increased by 8% =
12. 12.620 decreased by 35% =
13. 13.620 increased by 30% =
14. 14.260 decreased by 35% =
15. 15.308 increased by 25% =
16. 16.785 increased by 40% =
17. 17.360 increased by 60% =
18. 18.472 decreased by 50% =
19. 19.100 decreased by 10% =
20. 20.416 increased by 75% =
21. 21.315 increased by 20% =
22. 22.440 increased by 35% =
23. 23.726 decreased by 50% =
24. 24.420 increased by 20% =
25. 25.175 increased by 20% =
26. 26.360 increased by 15% =
27. 27.325 increased by 12% =
28. 28.600 decreased by 5% =
29. 29.720 decreased by 15% =
30. 30.750 increased by 12% =
31. 31.510 decreased by 10% =
32. 32.525 decreased by 60% =
33. 33.500 increased by 8% =
34. 34.250 decreased by 20% =
35. 35.750 increased by 8% =
36. 36.80 increased by 50% =
37. 37.464 decreased by 50% =
38. 38.720 decreased by 25% =
39. 39.372 decreased by 25% =
40. 40.740 increased by 35% =

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