Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 916 · 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 35% =
2. 2.440 decreased by 5% =
3. 3.615 increased by 40% =
4. 4.100 increased by 12% =
5. 5.485 decreased by 20% =
6. 6.100 decreased by 12% =
7. 7.675 increased by 12% =
8. 8.72 decreased by 25% =
9. 9.580 decreased by 15% =
10. 10.405 decreased by 40% =
11. 11.450 increased by 40% =
12. 12.572 decreased by 25% =
13. 13.400 increased by 35% =
14. 14.780 increased by 35% =
15. 15.260 decreased by 35% =
16. 16.180 increased by 10% =
17. 17.272 decreased by 75% =
18. 18.480 increased by 25% =
19. 19.95 decreased by 20% =
20. 20.420 increased by 50% =
21. 21.525 decreased by 12% =
22. 22.450 increased by 12% =
23. 23.345 increased by 40% =
24. 24.800 increased by 12% =
25. 25.575 increased by 8% =
26. 26.340 decreased by 15% =
27. 27.740 increased by 5% =
28. 28.600 increased by 40% =
29. 29.100 increased by 5% =
30. 30.212 decreased by 25% =
31. 31.76 increased by 75% =
32. 32.80 decreased by 5% =
33. 33.620 increased by 60% =
34. 34.605 increased by 20% =
35. 35.360 decreased by 5% =
36. 36.300 decreased by 60% =
37. 37.668 decreased by 75% =
38. 38.70 decreased by 40% =
39. 39.336 increased by 75% =
40. 40.590 decreased by 10% =

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