Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 177 · 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. 1.480 increased by 35% =
2. 2.495 increased by 20% =
3. 3.420 increased by 5% =
4. 4.280 decreased by 25% =
5. 5.588 decreased by 75% =
6. 6.660 decreased by 10% =
7. 7.400 increased by 5% =
8. 8.690 decreased by 20% =
9. 9.680 decreased by 15% =
10. 10.80 increased by 60% =
11. 11.680 decreased by 10% =
12. 12.800 decreased by 15% =
13. 13.592 increased by 75% =
14. 14.640 increased by 20% =
15. 15.460 decreased by 15% =
16. 16.120 increased by 30% =
17. 17.485 decreased by 20% =
18. 18.782 increased by 50% =
19. 19.630 decreased by 30% =
20. 20.450 decreased by 12% =
21. 21.320 decreased by 5% =
22. 22.90 decreased by 10% =
23. 23.330 increased by 40% =
24. 24.250 decreased by 8% =
25. 25.534 increased by 50% =
26. 26.610 decreased by 10% =
27. 27.480 increased by 5% =
28. 28.248 increased by 75% =
29. 29.250 decreased by 12% =
30. 30.480 decreased by 10% =
31. 31.180 increased by 50% =
32. 32.750 decreased by 8% =
33. 33.225 decreased by 12% =
34. 34.450 increased by 12% =
35. 35.550 decreased by 40% =
36. 36.380 decreased by 15% =
37. 37.425 increased by 8% =
38. 38.95 increased by 60% =
39. 39.290 increased by 60% =
40. 40.650 increased by 10% =

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