Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 183 · 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. 1.784 increased by 75% =
2. 2.660 decreased by 75% =
3. 3.640 increased by 60% =
4. 4.490 decreased by 50% =
5. 5.65 increased by 40% =
6. 6.764 decreased by 25% =
7. 7.212 decreased by 75% =
8. 8.665 decreased by 20% =
9. 9.340 increased by 15% =
10. 10.400 decreased by 75% =
11. 11.110 decreased by 20% =
12. 12.500 decreased by 5% =
13. 13.280 decreased by 30% =
14. 14.368 decreased by 75% =
15. 15.768 increased by 75% =
16. 16.285 increased by 20% =
17. 17.144 increased by 25% =
18. 18.380 decreased by 25% =
19. 19.720 increased by 5% =
20. 20.700 increased by 15% =
21. 21.344 increased by 75% =
22. 22.100 increased by 30% =
23. 23.480 increased by 15% =
24. 24.412 increased by 25% =
25. 25.175 decreased by 12% =
26. 26.780 increased by 15% =
27. 27.60 increased by 35% =
28. 28.775 increased by 20% =
29. 29.718 decreased by 50% =
30. 30.775 increased by 8% =
31. 31.605 increased by 60% =
32. 32.650 decreased by 20% =
33. 33.520 decreased by 35% =
34. 34.350 decreased by 40% =
35. 35.536 increased by 25% =
36. 36.420 increased by 5% =
37. 37.710 decreased by 60% =
38. 38.650 increased by 30% =
39. 39.525 decreased by 12% =
40. 40.770 increased by 30% =

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