Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 589 · 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. 1.330 increased by 10% =
2. 2.675 increased by 12% =
3. 3.336 increased by 75% =
4. 4.795 decreased by 40% =
5. 5.730 decreased by 30% =
6. 6.375 decreased by 12% =
7. 7.115 decreased by 40% =
8. 8.440 increased by 5% =
9. 9.650 increased by 8% =
10. 10.125 increased by 20% =
11. 11.200 decreased by 5% =
12. 12.300 increased by 35% =
13. 13.225 increased by 8% =
14. 14.225 decreased by 8% =
15. 15.530 increased by 20% =
16. 16.200 decreased by 40% =
17. 17.315 decreased by 20% =
18. 18.180 increased by 5% =
19. 19.555 increased by 60% =
20. 20.620 increased by 15% =
21. 21.680 decreased by 35% =
22. 22.530 increased by 20% =
23. 23.490 increased by 60% =
24. 24.105 increased by 20% =
25. 25.130 decreased by 30% =
26. 26.505 decreased by 40% =
27. 27.660 increased by 40% =
28. 28.400 increased by 10% =
29. 29.750 decreased by 12% =
30. 30.735 decreased by 40% =
31. 31.60 increased by 5% =
32. 32.640 increased by 5% =
33. 33.402 increased by 50% =
34. 34.760 increased by 35% =
35. 35.705 increased by 60% =
36. 36.545 decreased by 20% =
37. 37.360 increased by 5% =
38. 38.540 decreased by 15% =
39. 39.100 decreased by 35% =
40. 40.275 decreased by 12% =

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