Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 562 · 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. 1.740 decreased by 5% =
2. 2.208 increased by 50% =
3. 3.725 decreased by 12% =
4. 4.55 decreased by 60% =
5. 5.400 decreased by 15% =
6. 6.670 increased by 20% =
7. 7.400 increased by 30% =
8. 8.340 increased by 35% =
9. 9.185 increased by 40% =
10. 10.485 increased by 60% =
11. 11.600 increased by 15% =
12. 12.200 decreased by 35% =
13. 13.725 decreased by 8% =
14. 14.792 decreased by 25% =
15. 15.125 decreased by 12% =
16. 16.225 increased by 8% =
17. 17.140 decreased by 35% =
18. 18.160 decreased by 15% =
19. 19.400 increased by 8% =
20. 20.160 decreased by 10% =
21. 21.645 increased by 40% =
22. 22.750 decreased by 60% =
23. 23.300 increased by 8% =
24. 24.320 decreased by 35% =
25. 25.240 decreased by 15% =
26. 26.175 increased by 12% =
27. 27.745 increased by 60% =
28. 28.225 increased by 12% =
29. 29.452 decreased by 75% =
30. 30.320 increased by 60% =
31. 31.250 increased by 50% =
32. 32.410 increased by 50% =
33. 33.370 decreased by 20% =
34. 34.550 decreased by 10% =
35. 35.225 decreased by 20% =
36. 36.620 decreased by 25% =
37. 37.560 decreased by 10% =
38. 38.170 increased by 60% =
39. 39.640 decreased by 30% =
40. 40.150 decreased by 8% =

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