Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 341 · 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. 1.375 increased by 8% =
2. 2.520 increased by 5% =
3. 3.182 increased by 50% =
4. 4.570 decreased by 60% =
5. 5.380 increased by 35% =
6. 6.100 increased by 20% =
7. 7.720 increased by 15% =
8. 8.700 increased by 35% =
9. 9.380 decreased by 10% =
10. 10.340 increased by 60% =
11. 11.368 decreased by 25% =
12. 12.650 increased by 8% =
13. 13.665 increased by 60% =
14. 14.160 increased by 15% =
15. 15.375 decreased by 20% =
16. 16.260 increased by 20% =
17. 17.740 decreased by 10% =
18. 18.50 decreased by 8% =
19. 19.50 increased by 8% =
20. 20.225 increased by 8% =
21. 21.612 decreased by 25% =
22. 22.616 increased by 75% =
23. 23.250 decreased by 8% =
24. 24.120 increased by 15% =
25. 25.695 increased by 60% =
26. 26.484 increased by 25% =
27. 27.768 decreased by 75% =
28. 28.108 decreased by 75% =
29. 29.100 decreased by 35% =
30. 30.375 increased by 12% =
31. 31.705 increased by 20% =
32. 32.280 decreased by 15% =
33. 33.52 decreased by 50% =
34. 34.450 increased by 8% =
35. 35.605 increased by 60% =
36. 36.175 increased by 12% =
37. 37.792 decreased by 25% =
38. 38.750 decreased by 40% =
39. 39.780 increased by 10% =
40. 40.220 decreased by 10% =

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