Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 34 · 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. 1.410 increased by 60% =
2. 2.316 decreased by 75% =
3. 3.60 increased by 35% =
4. 4.292 decreased by 25% =
5. 5.208 decreased by 75% =
6. 6.210 decreased by 10% =
7. 7.645 decreased by 60% =
8. 8.184 increased by 25% =
9. 9.110 increased by 10% =
10. 10.425 decreased by 12% =
11. 11.765 increased by 60% =
12. 12.400 decreased by 15% =
13. 13.520 decreased by 15% =
14. 14.245 increased by 20% =
15. 15.640 increased by 60% =
16. 16.150 decreased by 12% =
17. 17.570 decreased by 30% =
18. 18.120 increased by 30% =
19. 19.784 increased by 75% =
20. 20.670 increased by 10% =
21. 21.165 increased by 20% =
22. 22.700 decreased by 15% =
23. 23.220 decreased by 35% =
24. 24.100 increased by 5% =
25. 25.500 increased by 10% =
26. 26.400 increased by 8% =
27. 27.420 decreased by 10% =
28. 28.680 decreased by 35% =
29. 29.340 increased by 15% =
30. 30.220 increased by 60% =
31. 31.130 decreased by 60% =
32. 32.300 increased by 35% =
33. 33.764 decreased by 25% =
34. 34.140 increased by 10% =
35. 35.172 increased by 25% =
36. 36.560 increased by 35% =
37. 37.650 decreased by 12% =
38. 38.182 decreased by 50% =
39. 39.450 decreased by 8% =
40. 40.700 increased by 15% =

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