Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 551 · 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. 1.796 increased by 25% =
2. 2.200 increased by 10% =
3. 3.290 decreased by 30% =
4. 4.800 decreased by 35% =
5. 5.240 increased by 5% =
6. 6.660 increased by 25% =
7. 7.365 decreased by 60% =
8. 8.425 increased by 8% =
9. 9.212 increased by 75% =
10. 10.670 increased by 50% =
11. 11.568 increased by 25% =
12. 12.140 increased by 75% =
13. 13.465 decreased by 60% =
14. 14.325 decreased by 12% =
15. 15.395 decreased by 40% =
16. 16.768 decreased by 25% =
17. 17.500 increased by 30% =
18. 18.604 decreased by 25% =
19. 19.490 decreased by 30% =
20. 20.48 increased by 25% =
21. 21.136 increased by 75% =
22. 22.750 decreased by 8% =
23. 23.450 decreased by 10% =
24. 24.160 increased by 40% =
25. 25.436 increased by 25% =
26. 26.140 increased by 75% =
27. 27.550 increased by 30% =
28. 28.340 increased by 25% =
29. 29.700 decreased by 8% =
30. 30.490 decreased by 10% =
31. 31.620 decreased by 35% =
32. 32.458 decreased by 50% =
33. 33.210 increased by 10% =
34. 34.736 increased by 75% =
35. 35.210 increased by 10% =
36. 36.225 increased by 8% =
37. 37.610 increased by 10% =
38. 38.156 decreased by 75% =
39. 39.180 increased by 35% =
40. 40.80 decreased by 15% =

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