Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 844 · 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. 1.380 increased by 5% =
2. 2.465 decreased by 20% =
3. 3.700 increased by 20% =
4. 4.260 increased by 35% =
5. 5.236 decreased by 25% =
6. 6.180 decreased by 40% =
7. 7.380 decreased by 15% =
8. 8.640 decreased by 10% =
9. 9.755 increased by 60% =
10. 10.40 increased by 15% =
11. 11.200 decreased by 5% =
12. 12.50 decreased by 30% =
13. 13.232 increased by 75% =
14. 14.75 increased by 12% =
15. 15.648 decreased by 25% =
16. 16.200 increased by 12% =
17. 17.425 decreased by 8% =
18. 18.225 decreased by 8% =
19. 19.640 decreased by 5% =
20. 20.245 increased by 60% =
21. 21.785 increased by 20% =
22. 22.725 increased by 8% =
23. 23.160 increased by 5% =
24. 24.500 decreased by 15% =
25. 25.404 increased by 25% =
26. 26.580 increased by 15% =
27. 27.45 increased by 20% =
28. 28.40 increased by 75% =
29. 29.395 decreased by 20% =
30. 30.280 increased by 5% =
31. 31.95 increased by 40% =
32. 32.474 decreased by 50% =
33. 33.234 increased by 50% =
34. 34.250 increased by 8% =
35. 35.525 increased by 40% =
36. 36.620 increased by 20% =
37. 37.485 increased by 60% =
38. 38.240 increased by 20% =
39. 39.310 increased by 60% =
40. 40.500 decreased by 10% =

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