Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 490 · 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. 1.652 decreased by 25% =
2. 2.175 increased by 12% =
3. 3.380 increased by 5% =
4. 4.705 increased by 20% =
5. 5.480 increased by 15% =
6. 6.528 increased by 75% =
7. 7.280 decreased by 35% =
8. 8.475 decreased by 8% =
9. 9.175 decreased by 12% =
10. 10.700 decreased by 30% =
11. 11.425 increased by 8% =
12. 12.45 increased by 60% =
13. 13.728 increased by 75% =
14. 14.480 increased by 30% =
15. 15.740 increased by 15% =
16. 16.700 decreased by 35% =
17. 17.775 decreased by 12% =
18. 18.320 increased by 25% =
19. 19.475 decreased by 60% =
20. 20.500 increased by 8% =
21. 21.740 increased by 50% =
22. 22.420 increased by 75% =
23. 23.130 decreased by 50% =
24. 24.582 increased by 50% =
25. 25.320 decreased by 15% =
26. 26.520 increased by 15% =
27. 27.140 increased by 30% =
28. 28.675 increased by 12% =
29. 29.775 decreased by 8% =
30. 30.516 increased by 25% =
31. 31.720 increased by 20% =
32. 32.765 decreased by 20% =
33. 33.80 increased by 35% =
34. 34.64 increased by 75% =
35. 35.85 decreased by 40% =
36. 36.500 decreased by 15% =
37. 37.460 increased by 35% =
38. 38.128 decreased by 25% =
39. 39.740 increased by 35% =
40. 40.684 decreased by 25% =

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