Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 233 · 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. 1.740 increased by 15% =
2. 2.560 decreased by 35% =
3. 3.40 increased by 40% =
4. 4.725 decreased by 12% =
5. 5.350 decreased by 10% =
6. 6.100 increased by 30% =
7. 7.180 decreased by 15% =
8. 8.680 increased by 15% =
9. 9.264 increased by 25% =
10. 10.750 increased by 60% =
11. 11.570 decreased by 10% =
12. 12.250 decreased by 10% =
13. 13.700 increased by 5% =
14. 14.210 increased by 30% =
15. 15.790 increased by 40% =
16. 16.720 increased by 5% =
17. 17.180 decreased by 15% =
18. 18.544 increased by 25% =
19. 19.375 decreased by 12% =
20. 20.156 increased by 50% =
21. 21.460 increased by 35% =
22. 22.764 increased by 25% =
23. 23.600 increased by 5% =
24. 24.800 decreased by 35% =
25. 25.100 increased by 15% =
26. 26.120 increased by 30% =
27. 27.240 decreased by 25% =
28. 28.430 decreased by 10% =
29. 29.480 decreased by 10% =
30. 30.508 decreased by 50% =
31. 31.560 increased by 5% =
32. 32.240 decreased by 30% =
33. 33.760 decreased by 10% =
34. 34.560 decreased by 10% =
35. 35.460 increased by 10% =
36. 36.40 increased by 5% =
37. 37.772 decreased by 75% =
38. 38.370 increased by 60% =
39. 39.165 increased by 20% =
40. 40.800 decreased by 30% =

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