Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 742 · 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. 1.775 increased by 12% =
2. 2.670 increased by 10% =
3. 3.215 increased by 60% =
4. 4.152 decreased by 25% =
5. 5.200 increased by 12% =
6. 6.55 decreased by 60% =
7. 7.660 increased by 15% =
8. 8.370 increased by 10% =
9. 9.280 increased by 10% =
10. 10.544 increased by 75% =
11. 11.420 decreased by 50% =
12. 12.600 increased by 50% =
13. 13.174 increased by 50% =
14. 14.690 decreased by 60% =
15. 15.90 increased by 20% =
16. 16.100 increased by 50% =
17. 17.800 increased by 12% =
18. 18.560 increased by 30% =
19. 19.640 decreased by 35% =
20. 20.380 increased by 5% =
21. 21.600 increased by 30% =
22. 22.75 decreased by 12% =
23. 23.635 increased by 40% =
24. 24.100 decreased by 30% =
25. 25.302 increased by 50% =
26. 26.620 increased by 75% =
27. 27.450 increased by 8% =
28. 28.120 decreased by 15% =
29. 29.80 decreased by 35% =
30. 30.800 decreased by 12% =
31. 31.340 decreased by 50% =
32. 32.685 decreased by 60% =
33. 33.250 increased by 10% =
34. 34.440 decreased by 10% =
35. 35.530 decreased by 10% =
36. 36.400 decreased by 60% =
37. 37.300 increased by 8% =
38. 38.45 decreased by 40% =
39. 39.486 increased by 50% =
40. 40.688 decreased by 50% =

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