Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 359 · 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. 1.300 decreased by 5% =
2. 2.672 increased by 50% =
3. 3.600 increased by 5% =
4. 4.150 increased by 8% =
5. 5.380 decreased by 5% =
6. 6.580 decreased by 35% =
7. 7.220 decreased by 5% =
8. 8.760 decreased by 5% =
9. 9.660 decreased by 15% =
10. 10.65 increased by 20% =
11. 11.340 decreased by 15% =
12. 12.44 increased by 50% =
13. 13.640 decreased by 40% =
14. 14.150 decreased by 8% =
15. 15.775 decreased by 60% =
16. 16.674 increased by 50% =
17. 17.372 increased by 75% =
18. 18.168 decreased by 75% =
19. 19.320 increased by 15% =
20. 20.525 increased by 40% =
21. 21.225 decreased by 60% =
22. 22.448 increased by 25% =
23. 23.500 increased by 5% =
24. 24.340 increased by 35% =
25. 25.260 increased by 5% =
26. 26.382 increased by 50% =
27. 27.75 increased by 12% =
28. 28.312 decreased by 25% =
29. 29.595 increased by 40% =
30. 30.760 decreased by 35% =
31. 31.775 increased by 8% =
32. 32.480 decreased by 25% =
33. 33.772 decreased by 50% =
34. 34.700 increased by 25% =
35. 35.472 increased by 25% =
36. 36.500 increased by 30% =
37. 37.325 decreased by 8% =
38. 38.780 increased by 5% =
39. 39.376 decreased by 50% =
40. 40.480 increased by 5% =

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