Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 429 · 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. 1.755 decreased by 60% =
2. 2.500 increased by 8% =
3. 3.800 increased by 30% =
4. 4.540 increased by 5% =
5. 5.640 increased by 35% =
6. 6.225 increased by 12% =
7. 7.660 increased by 30% =
8. 8.280 decreased by 50% =
9. 9.580 increased by 35% =
10. 10.520 increased by 10% =
11. 11.280 increased by 20% =
12. 12.200 decreased by 35% =
13. 13.720 decreased by 15% =
14. 14.272 decreased by 50% =
15. 15.200 increased by 10% =
16. 16.450 decreased by 30% =
17. 17.760 increased by 10% =
18. 18.320 increased by 10% =
19. 19.650 decreased by 8% =
20. 20.675 increased by 60% =
21. 21.700 decreased by 8% =
22. 22.130 decreased by 10% =
23. 23.140 increased by 5% =
24. 24.660 increased by 35% =
25. 25.500 increased by 15% =
26. 26.420 increased by 15% =
27. 27.200 decreased by 8% =
28. 28.696 decreased by 75% =
29. 29.705 increased by 60% =
30. 30.80 increased by 15% =
31. 31.140 increased by 35% =
32. 32.270 increased by 40% =
33. 33.600 decreased by 8% =
34. 34.650 increased by 8% =
35. 35.140 decreased by 15% =
36. 36.340 decreased by 5% =
37. 37.280 decreased by 35% =
38. 38.412 increased by 75% =
39. 39.590 decreased by 30% =
40. 40.140 decreased by 15% =

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