Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 104 · 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. 1.80 increased by 25% =
2. 2.130 increased by 30% =
3. 3.200 increased by 10% =
4. 4.540 increased by 30% =
5. 5.420 increased by 5% =
6. 6.175 decreased by 8% =
7. 7.420 decreased by 10% =
8. 8.404 increased by 75% =
9. 9.545 increased by 40% =
10. 10.220 decreased by 15% =
11. 11.556 increased by 75% =
12. 12.760 decreased by 15% =
13. 13.496 decreased by 25% =
14. 14.95 increased by 60% =
15. 15.360 increased by 40% =
16. 16.375 increased by 40% =
17. 17.580 increased by 35% =
18. 18.310 decreased by 10% =
19. 19.200 decreased by 5% =
20. 20.560 increased by 5% =
21. 21.384 decreased by 75% =
22. 22.230 increased by 60% =
23. 23.760 increased by 15% =
24. 24.190 increased by 60% =
25. 25.104 decreased by 25% =
26. 26.525 increased by 60% =
27. 27.200 increased by 15% =
28. 28.528 decreased by 25% =
29. 29.276 increased by 75% =
30. 30.506 increased by 50% =
31. 31.420 increased by 10% =
32. 32.152 decreased by 75% =
33. 33.736 increased by 25% =
34. 34.600 decreased by 5% =
35. 35.40 decreased by 20% =
36. 36.105 increased by 20% =
37. 37.760 decreased by 5% =
38. 38.84 decreased by 75% =
39. 39.260 decreased by 35% =
40. 40.80 increased by 10% =

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