Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 491 · 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. 1.620 increased by 35% =
2. 2.725 decreased by 12% =
3. 3.225 decreased by 12% =
4. 4.508 increased by 25% =
5. 5.720 increased by 15% =
6. 6.100 increased by 8% =
7. 7.200 increased by 12% =
8. 8.180 increased by 15% =
9. 9.340 decreased by 15% =
10. 10.390 increased by 20% =
11. 11.480 increased by 15% =
12. 12.75 increased by 8% =
13. 13.180 decreased by 35% =
14. 14.125 decreased by 8% =
15. 15.340 decreased by 10% =
16. 16.280 increased by 10% =
17. 17.314 decreased by 50% =
18. 18.120 decreased by 30% =
19. 19.90 increased by 30% =
20. 20.380 decreased by 5% =
21. 21.440 decreased by 5% =
22. 22.492 increased by 75% =
23. 23.602 decreased by 50% =
24. 24.490 increased by 60% =
25. 25.140 increased by 40% =
26. 26.800 increased by 12% =
27. 27.564 decreased by 25% =
28. 28.790 increased by 30% =
29. 29.700 decreased by 10% =
30. 30.90 decreased by 60% =
31. 31.280 increased by 35% =
32. 32.420 decreased by 15% =
33. 33.190 decreased by 10% =
34. 34.390 decreased by 10% =
35. 35.640 increased by 35% =
36. 36.570 increased by 10% =
37. 37.608 increased by 75% =
38. 38.575 decreased by 12% =
39. 39.240 decreased by 35% =
40. 40.125 increased by 12% =

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