Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 736 · 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. 1.350 increased by 12% =
2. 2.640 increased by 5% =
3. 3.725 increased by 20% =
4. 4.390 increased by 20% =
5. 5.168 increased by 75% =
6. 6.440 increased by 30% =
7. 7.160 increased by 30% =
8. 8.60 decreased by 75% =
9. 9.616 increased by 75% =
10. 10.580 decreased by 35% =
11. 11.600 decreased by 5% =
12. 12.150 increased by 30% =
13. 13.410 increased by 10% =
14. 14.200 increased by 75% =
15. 15.360 decreased by 5% =
16. 16.438 increased by 50% =
17. 17.575 increased by 20% =
18. 18.205 decreased by 60% =
19. 19.500 increased by 12% =
20. 20.220 decreased by 15% =
21. 21.720 decreased by 10% =
22. 22.240 increased by 5% =
23. 23.300 increased by 15% =
24. 24.92 decreased by 75% =
25. 25.400 decreased by 8% =
26. 26.660 decreased by 5% =
27. 27.260 increased by 15% =
28. 28.344 increased by 75% =
29. 29.530 decreased by 60% =
30. 30.40 decreased by 10% =
31. 31.600 decreased by 12% =
32. 32.520 decreased by 15% =
33. 33.348 decreased by 25% =
34. 34.75 decreased by 40% =
35. 35.425 increased by 12% =
36. 36.670 increased by 10% =
37. 37.110 increased by 10% =
38. 38.240 decreased by 10% =
39. 39.800 increased by 40% =
40. 40.630 increased by 60% =

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