Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 706 · 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. 1.360 increased by 75% =
2. 2.172 decreased by 50% =
3. 3.320 increased by 35% =
4. 4.440 decreased by 10% =
5. 5.300 increased by 12% =
6. 6.45 increased by 20% =
7. 7.300 increased by 8% =
8. 8.450 decreased by 8% =
9. 9.620 increased by 15% =
10. 10.248 increased by 75% =
11. 11.540 decreased by 20% =
12. 12.260 increased by 15% =
13. 13.340 increased by 20% =
14. 14.500 decreased by 12% =
15. 15.340 increased by 15% =
16. 16.160 increased by 40% =
17. 17.400 decreased by 8% =
18. 18.300 decreased by 12% =
19. 19.310 decreased by 60% =
20. 20.600 decreased by 5% =
21. 21.440 increased by 5% =
22. 22.200 decreased by 30% =
23. 23.230 increased by 40% =
24. 24.120 increased by 10% =
25. 25.604 increased by 50% =
26. 26.500 increased by 8% =
27. 27.660 decreased by 15% =
28. 28.520 increased by 15% =
29. 29.380 increased by 75% =
30. 30.72 increased by 25% =
31. 31.776 decreased by 25% =
32. 32.256 decreased by 25% =
33. 33.205 increased by 40% =
34. 34.132 decreased by 25% =
35. 35.460 decreased by 5% =
36. 36.700 decreased by 12% =
37. 37.600 increased by 15% =
38. 38.800 increased by 10% =
39. 39.760 increased by 5% =
40. 40.200 decreased by 5% =

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