Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 377 · 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. 1.352 decreased by 75% =
2. 2.590 increased by 30% =
3. 3.460 increased by 35% =
4. 4.628 decreased by 75% =
5. 5.482 increased by 50% =
6. 6.572 decreased by 25% =
7. 7.398 increased by 50% =
8. 8.580 increased by 35% =
9. 9.60 decreased by 15% =
10. 10.540 decreased by 35% =
11. 11.60 decreased by 5% =
12. 12.380 increased by 35% =
13. 13.540 increased by 35% =
14. 14.660 increased by 15% =
15. 15.628 increased by 25% =
16. 16.360 increased by 5% =
17. 17.140 decreased by 5% =
18. 18.650 decreased by 12% =
19. 19.210 decreased by 20% =
20. 20.595 decreased by 60% =
21. 21.340 increased by 25% =
22. 22.385 increased by 20% =
23. 23.400 increased by 35% =
24. 24.240 decreased by 10% =
25. 25.510 decreased by 20% =
26. 26.244 decreased by 50% =
27. 27.680 increased by 15% =
28. 28.750 decreased by 12% =
29. 29.260 increased by 35% =
30. 30.205 decreased by 20% =
31. 31.150 increased by 30% =
32. 32.208 increased by 25% =
33. 33.220 decreased by 5% =
34. 34.140 decreased by 5% =
35. 35.140 increased by 35% =
36. 36.220 increased by 10% =
37. 37.220 decreased by 60% =
38. 38.90 decreased by 40% =
39. 39.780 decreased by 25% =
40. 40.152 decreased by 75% =

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