Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 492 · 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. 1.560 increased by 35% =
2. 2.464 decreased by 75% =
3. 3.670 increased by 20% =
4. 4.390 decreased by 20% =
5. 5.690 decreased by 10% =
6. 6.780 decreased by 35% =
7. 7.50 decreased by 8% =
8. 8.320 increased by 5% =
9. 9.395 increased by 60% =
10. 10.610 increased by 10% =
11. 11.250 increased by 8% =
12. 12.125 increased by 12% =
13. 13.255 increased by 60% =
14. 14.455 increased by 60% =
15. 15.625 decreased by 12% =
16. 16.250 decreased by 12% =
17. 17.755 increased by 20% =
18. 18.320 decreased by 15% =
19. 19.500 increased by 15% =
20. 20.225 decreased by 8% =
21. 21.635 increased by 20% =
22. 22.610 increased by 20% =
23. 23.608 increased by 75% =
24. 24.760 decreased by 10% =
25. 25.750 increased by 12% =
26. 26.530 increased by 40% =
27. 27.400 increased by 60% =
28. 28.725 decreased by 8% =
29. 29.580 increased by 30% =
30. 30.540 increased by 5% =
31. 31.700 increased by 35% =
32. 32.114 increased by 50% =
33. 33.420 increased by 15% =
34. 34.650 increased by 8% =
35. 35.110 decreased by 40% =
36. 36.370 decreased by 10% =
37. 37.55 decreased by 40% =
38. 38.470 decreased by 30% =
39. 39.730 increased by 20% =
40. 40.465 decreased by 40% =

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