Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 582 · 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. 1.130 increased by 10% =
2. 2.675 increased by 12% =
3. 3.612 decreased by 25% =
4. 4.100 increased by 40% =
5. 5.680 decreased by 25% =
6. 6.50 increased by 8% =
7. 7.615 decreased by 20% =
8. 8.125 increased by 8% =
9. 9.100 decreased by 30% =
10. 10.775 increased by 12% =
11. 11.150 increased by 10% =
12. 12.65 decreased by 40% =
13. 13.555 increased by 40% =
14. 14.360 increased by 60% =
15. 15.760 increased by 15% =
16. 16.325 increased by 8% =
17. 17.620 decreased by 20% =
18. 18.300 decreased by 15% =
19. 19.125 decreased by 8% =
20. 20.500 increased by 35% =
21. 21.270 decreased by 30% =
22. 22.220 increased by 35% =
23. 23.392 increased by 50% =
24. 24.640 increased by 15% =
25. 25.650 increased by 60% =
26. 26.580 increased by 20% =
27. 27.710 decreased by 50% =
28. 28.188 decreased by 75% =
29. 29.290 decreased by 20% =
30. 30.425 increased by 8% =
31. 31.180 decreased by 5% =
32. 32.208 increased by 25% =
33. 33.720 increased by 40% =
34. 34.280 increased by 60% =
35. 35.56 decreased by 75% =
36. 36.150 decreased by 8% =
37. 37.800 increased by 35% =
38. 38.600 increased by 15% =
39. 39.712 increased by 25% =
40. 40.205 increased by 40% =

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