Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 178 · 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. 1.640 increased by 35% =
2. 2.130 increased by 30% =
3. 3.75 decreased by 8% =
4. 4.325 increased by 12% =
5. 5.200 increased by 30% =
6. 6.50 increased by 8% =
7. 7.180 increased by 75% =
8. 8.645 decreased by 40% =
9. 9.200 decreased by 8% =
10. 10.620 increased by 10% =
11. 11.360 decreased by 35% =
12. 12.192 decreased by 75% =
13. 13.456 increased by 25% =
14. 14.740 decreased by 10% =
15. 15.520 decreased by 30% =
16. 16.500 increased by 10% =
17. 17.80 increased by 5% =
18. 18.750 increased by 12% =
19. 19.496 decreased by 50% =
20. 20.625 increased by 8% =
21. 21.500 decreased by 5% =
22. 22.705 increased by 20% =
23. 23.348 increased by 75% =
24. 24.260 increased by 10% =
25. 25.420 increased by 5% =
26. 26.525 increased by 20% =
27. 27.100 increased by 40% =
28. 28.294 increased by 50% =
29. 29.790 increased by 60% =
30. 30.570 decreased by 60% =
31. 31.96 increased by 75% =
32. 32.60 increased by 75% =
33. 33.180 decreased by 15% =
34. 34.610 increased by 10% =
35. 35.460 decreased by 5% =
36. 36.764 increased by 25% =
37. 37.500 decreased by 5% =
38. 38.52 decreased by 75% =
39. 39.236 increased by 50% =
40. 40.70 increased by 30% =

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