Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 868 · 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. 1.705 decreased by 60% =
2. 2.720 increased by 15% =
3. 3.400 decreased by 5% =
4. 4.40 increased by 35% =
5. 5.250 increased by 12% =
6. 6.125 increased by 40% =
7. 7.280 increased by 30% =
8. 8.756 increased by 25% =
9. 9.400 increased by 15% =
10. 10.180 decreased by 10% =
11. 11.85 increased by 60% =
12. 12.320 decreased by 35% =
13. 13.200 increased by 12% =
14. 14.180 decreased by 60% =
15. 15.455 decreased by 40% =
16. 16.760 decreased by 35% =
17. 17.175 increased by 8% =
18. 18.360 increased by 15% =
19. 19.750 increased by 10% =
20. 20.420 decreased by 15% =
21. 21.760 increased by 5% =
22. 22.650 decreased by 60% =
23. 23.420 increased by 20% =
24. 24.550 decreased by 12% =
25. 25.300 increased by 25% =
26. 26.75 decreased by 12% =
27. 27.725 increased by 20% =
28. 28.194 increased by 50% =
29. 29.360 increased by 20% =
30. 30.210 decreased by 30% =
31. 31.700 decreased by 12% =
32. 32.360 decreased by 10% =
33. 33.125 decreased by 8% =
34. 34.800 decreased by 35% =
35. 35.400 decreased by 60% =
36. 36.176 decreased by 75% =
37. 37.350 decreased by 8% =
38. 38.520 decreased by 35% =
39. 39.340 increased by 40% =
40. 40.650 decreased by 60% =

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