Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 978 · 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 8% =
2. 2.700 increased by 60% =
3. 3.160 decreased by 40% =
4. 4.210 decreased by 50% =
5. 5.80 increased by 15% =
6. 6.475 decreased by 8% =
7. 7.650 decreased by 30% =
8. 8.600 decreased by 12% =
9. 9.50 increased by 10% =
10. 10.400 decreased by 20% =
11. 11.260 decreased by 15% =
12. 12.200 increased by 35% =
13. 13.540 increased by 35% =
14. 14.215 decreased by 20% =
15. 15.280 decreased by 10% =
16. 16.696 increased by 75% =
17. 17.700 increased by 50% =
18. 18.240 decreased by 5% =
19. 19.275 decreased by 12% =
20. 20.470 increased by 10% =
21. 21.525 decreased by 8% =
22. 22.210 increased by 10% =
23. 23.80 decreased by 15% =
24. 24.180 increased by 35% =
25. 25.448 decreased by 75% =
26. 26.48 decreased by 50% =
27. 27.300 increased by 30% =
28. 28.175 increased by 12% =
29. 29.176 increased by 50% =
30. 30.150 decreased by 12% =
31. 31.440 increased by 35% =
32. 32.370 increased by 60% =
33. 33.235 decreased by 20% =
34. 34.520 increased by 15% =
35. 35.800 decreased by 5% =
36. 36.40 decreased by 60% =
37. 37.680 decreased by 5% =
38. 38.110 decreased by 10% =
39. 39.695 decreased by 20% =
40. 40.55 increased by 20% =

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