Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 363 · 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. 1.40 increased by 5% =
2. 2.540 decreased by 75% =
3. 3.790 decreased by 30% =
4. 4.710 decreased by 10% =
5. 5.100 decreased by 35% =
6. 6.705 decreased by 60% =
7. 7.80 increased by 10% =
8. 8.585 increased by 40% =
9. 9.290 decreased by 40% =
10. 10.772 increased by 25% =
11. 11.700 increased by 10% =
12. 12.565 decreased by 60% =
13. 13.760 decreased by 5% =
14. 14.238 increased by 50% =
15. 15.340 increased by 10% =
16. 16.696 decreased by 25% =
17. 17.676 decreased by 25% =
18. 18.140 increased by 15% =
19. 19.700 decreased by 30% =
20. 20.124 decreased by 25% =
21. 21.440 increased by 25% =
22. 22.500 decreased by 12% =
23. 23.140 decreased by 30% =
24. 24.180 increased by 15% =
25. 25.400 increased by 35% =
26. 26.225 increased by 8% =
27. 27.700 decreased by 30% =
28. 28.240 decreased by 30% =
29. 29.650 decreased by 40% =
30. 30.460 decreased by 15% =
31. 31.560 decreased by 30% =
32. 32.800 decreased by 8% =
33. 33.580 increased by 30% =
34. 34.675 decreased by 8% =
35. 35.604 decreased by 25% =
36. 36.244 increased by 25% =
37. 37.772 increased by 75% =
38. 38.50 decreased by 10% =
39. 39.715 decreased by 40% =
40. 40.284 decreased by 50% =

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