Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 408 · 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. 1.190 decreased by 30% =
2. 2.180 increased by 35% =
3. 3.725 increased by 20% =
4. 4.440 decreased by 5% =
5. 5.240 increased by 15% =
6. 6.400 increased by 35% =
7. 7.164 increased by 75% =
8. 8.260 increased by 75% =
9. 9.240 increased by 5% =
10. 10.280 decreased by 15% =
11. 11.705 increased by 20% =
12. 12.720 decreased by 15% =
13. 13.280 increased by 5% =
14. 14.425 increased by 8% =
15. 15.370 increased by 10% =
16. 16.215 decreased by 60% =
17. 17.250 increased by 10% =
18. 18.750 increased by 8% =
19. 19.44 increased by 25% =
20. 20.380 increased by 35% =
21. 21.500 increased by 10% =
22. 22.175 decreased by 8% =
23. 23.50 increased by 10% =
24. 24.508 increased by 25% =
25. 25.460 decreased by 20% =
26. 26.500 increased by 30% =
27. 27.180 increased by 10% =
28. 28.785 increased by 20% =
29. 29.380 increased by 35% =
30. 30.230 increased by 10% =
31. 31.725 decreased by 8% =
32. 32.710 decreased by 10% =
33. 33.95 decreased by 60% =
34. 34.80 decreased by 35% =
35. 35.180 increased by 20% =
36. 36.260 decreased by 5% =
37. 37.548 increased by 75% =
38. 38.590 increased by 10% =
39. 39.140 increased by 35% =
40. 40.472 increased by 25% =

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