Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 241 · 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. 1.440 increased by 10% =
2. 2.240 decreased by 25% =
3. 3.110 decreased by 10% =
4. 4.710 increased by 10% =
5. 5.490 increased by 10% =
6. 6.636 decreased by 25% =
7. 7.692 decreased by 25% =
8. 8.320 decreased by 30% =
9. 9.300 decreased by 15% =
10. 10.375 decreased by 60% =
11. 11.725 decreased by 12% =
12. 12.50 increased by 30% =
13. 13.310 increased by 30% =
14. 14.400 increased by 10% =
15. 15.380 increased by 60% =
16. 16.525 increased by 12% =
17. 17.500 decreased by 8% =
18. 18.92 increased by 25% =
19. 19.200 increased by 30% =
20. 20.210 decreased by 10% =
21. 21.580 increased by 15% =
22. 22.410 increased by 60% =
23. 23.750 decreased by 8% =
24. 24.132 decreased by 75% =
25. 25.725 increased by 20% =
26. 26.225 decreased by 12% =
27. 27.600 increased by 12% =
28. 28.700 decreased by 30% =
29. 29.140 increased by 10% =
30. 30.310 increased by 40% =
31. 31.80 increased by 5% =
32. 32.444 increased by 25% =
33. 33.550 increased by 60% =
34. 34.800 increased by 8% =
35. 35.550 decreased by 12% =
36. 36.445 decreased by 20% =
37. 37.375 decreased by 12% =
38. 38.480 increased by 35% =
39. 39.580 increased by 35% =
40. 40.220 increased by 30% =

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