Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 92 · 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. 1.192 increased by 75% =
2. 2.40 increased by 10% =
3. 3.500 decreased by 15% =
4. 4.410 decreased by 10% =
5. 5.165 increased by 20% =
6. 6.704 increased by 75% =
7. 7.592 increased by 25% =
8. 8.250 decreased by 12% =
9. 9.140 increased by 5% =
10. 10.125 decreased by 20% =
11. 11.200 increased by 15% =
12. 12.740 increased by 35% =
13. 13.480 increased by 15% =
14. 14.156 increased by 50% =
15. 15.528 increased by 25% =
16. 16.44 decreased by 50% =
17. 17.740 decreased by 35% =
18. 18.200 increased by 15% =
19. 19.300 increased by 8% =
20. 20.100 decreased by 10% =
21. 21.60 increased by 15% =
22. 22.542 increased by 50% =
23. 23.780 increased by 5% =
24. 24.624 decreased by 75% =
25. 25.415 increased by 20% =
26. 26.525 increased by 40% =
27. 27.460 decreased by 10% =
28. 28.244 decreased by 50% =
29. 29.650 decreased by 10% =
30. 30.740 increased by 60% =
31. 31.215 decreased by 20% =
32. 32.385 increased by 20% =
33. 33.740 increased by 35% =
34. 34.620 increased by 35% =
35. 35.400 increased by 5% =
36. 36.516 increased by 75% =
37. 37.75 decreased by 12% =
38. 38.50 increased by 40% =
39. 39.790 increased by 10% =
40. 40.480 increased by 35% =

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