Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 573 · 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. 1.550 increased by 10% =
2. 2.304 increased by 25% =
3. 3.750 increased by 8% =
4. 4.480 decreased by 30% =
5. 5.700 decreased by 30% =
6. 6.200 increased by 12% =
7. 7.356 increased by 50% =
8. 8.460 decreased by 60% =
9. 9.90 decreased by 10% =
10. 10.270 increased by 10% =
11. 11.700 increased by 5% =
12. 12.366 decreased by 50% =
13. 13.620 increased by 15% =
14. 14.420 increased by 5% =
15. 15.510 increased by 40% =
16. 16.60 increased by 40% =
17. 17.140 decreased by 30% =
18. 18.560 increased by 5% =
19. 19.790 increased by 40% =
20. 20.150 increased by 8% =
21. 21.370 increased by 60% =
22. 22.40 decreased by 60% =
23. 23.705 decreased by 60% =
24. 24.640 increased by 15% =
25. 25.125 increased by 12% =
26. 26.235 decreased by 40% =
27. 27.380 increased by 35% =
28. 28.80 increased by 30% =
29. 29.215 decreased by 60% =
30. 30.175 increased by 8% =
31. 31.400 decreased by 75% =
32. 32.50 decreased by 20% =
33. 33.340 decreased by 5% =
34. 34.120 decreased by 5% =
35. 35.204 increased by 75% =
36. 36.725 increased by 12% =
37. 37.616 increased by 50% =
38. 38.776 increased by 75% =
39. 39.600 increased by 35% =
40. 40.725 increased by 8% =

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