Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 712 · 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. 1.250 increased by 8% =
2. 2.140 increased by 10% =
3. 3.600 increased by 12% =
4. 4.592 decreased by 25% =
5. 5.532 decreased by 75% =
6. 6.600 increased by 25% =
7. 7.100 increased by 5% =
8. 8.175 decreased by 8% =
9. 9.160 increased by 15% =
10. 10.700 increased by 8% =
11. 11.240 increased by 30% =
12. 12.480 decreased by 60% =
13. 13.448 increased by 25% =
14. 14.264 increased by 50% =
15. 15.40 increased by 35% =
16. 16.480 decreased by 20% =
17. 17.295 decreased by 60% =
18. 18.775 decreased by 12% =
19. 19.680 increased by 30% =
20. 20.475 decreased by 12% =
21. 21.640 increased by 5% =
22. 22.400 decreased by 10% =
23. 23.400 increased by 30% =
24. 24.450 decreased by 12% =
25. 25.175 increased by 8% =
26. 26.525 increased by 12% =
27. 27.540 decreased by 15% =
28. 28.120 decreased by 30% =
29. 29.640 increased by 5% =
30. 30.540 decreased by 35% =
31. 31.280 decreased by 35% =
32. 32.138 decreased by 50% =
33. 33.70 decreased by 10% =
34. 34.392 increased by 25% =
35. 35.580 decreased by 5% =
36. 36.720 increased by 5% =
37. 37.620 increased by 5% =
38. 38.260 increased by 10% =
39. 39.90 decreased by 20% =
40. 40.660 increased by 30% =

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