Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 333 · 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. 1.548 increased by 75% =
2. 2.395 increased by 20% =
3. 3.380 increased by 40% =
4. 4.745 increased by 60% =
5. 5.156 decreased by 25% =
6. 6.160 decreased by 5% =
7. 7.430 increased by 30% =
8. 8.515 increased by 20% =
9. 9.130 increased by 10% =
10. 10.576 increased by 25% =
11. 11.220 increased by 35% =
12. 12.60 increased by 30% =
13. 13.125 decreased by 20% =
14. 14.196 decreased by 25% =
15. 15.260 decreased by 5% =
16. 16.190 decreased by 60% =
17. 17.100 increased by 35% =
18. 18.150 decreased by 8% =
19. 19.125 decreased by 8% =
20. 20.536 increased by 50% =
21. 21.800 decreased by 15% =
22. 22.145 increased by 40% =
23. 23.450 increased by 8% =
24. 24.450 decreased by 20% =
25. 25.400 increased by 35% =
26. 26.595 decreased by 40% =
27. 27.100 decreased by 8% =
28. 28.440 increased by 35% =
29. 29.280 decreased by 10% =
30. 30.362 increased by 50% =
31. 31.648 increased by 25% =
32. 32.675 increased by 60% =
33. 33.740 decreased by 30% =
34. 34.398 increased by 50% =
35. 35.400 increased by 5% =
36. 36.584 increased by 50% =
37. 37.320 increased by 5% =
38. 38.800 increased by 30% =
39. 39.500 increased by 5% =
40. 40.180 decreased by 15% =

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