Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 69 · 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. 1.200 increased by 5% =
2. 2.460 increased by 25% =
3. 3.200 decreased by 8% =
4. 4.430 increased by 30% =
5. 5.270 increased by 30% =
6. 6.770 decreased by 10% =
7. 7.280 increased by 35% =
8. 8.45 increased by 20% =
9. 9.435 increased by 40% =
10. 10.128 increased by 75% =
11. 11.65 increased by 20% =
12. 12.660 decreased by 40% =
13. 13.200 decreased by 35% =
14. 14.165 decreased by 60% =
15. 15.85 increased by 40% =
16. 16.160 decreased by 5% =
17. 17.745 increased by 20% =
18. 18.780 increased by 40% =
19. 19.504 decreased by 75% =
20. 20.360 decreased by 35% =
21. 21.240 increased by 30% =
22. 22.420 increased by 25% =
23. 23.788 decreased by 50% =
24. 24.320 decreased by 40% =
25. 25.260 decreased by 25% =
26. 26.725 increased by 8% =
27. 27.492 decreased by 25% =
28. 28.584 decreased by 50% =
29. 29.125 decreased by 60% =
30. 30.95 decreased by 20% =
31. 31.180 increased by 5% =
32. 32.605 increased by 60% =
33. 33.308 decreased by 25% =
34. 34.600 increased by 15% =
35. 35.300 decreased by 30% =
36. 36.760 decreased by 25% =
37. 37.100 decreased by 10% =
38. 38.620 increased by 35% =
39. 39.384 decreased by 25% =
40. 40.620 decreased by 5% =

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