Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 944 · 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. 1.150 increased by 30% =
2. 2.600 decreased by 75% =
3. 3.142 increased by 50% =
4. 4.275 increased by 12% =
5. 5.160 decreased by 15% =
6. 6.640 increased by 15% =
7. 7.640 decreased by 5% =
8. 8.180 increased by 15% =
9. 9.302 decreased by 50% =
10. 10.500 increased by 15% =
11. 11.325 increased by 40% =
12. 12.740 decreased by 15% =
13. 13.40 increased by 5% =
14. 14.596 increased by 75% =
15. 15.446 increased by 50% =
16. 16.220 decreased by 35% =
17. 17.500 decreased by 35% =
18. 18.574 decreased by 50% =
19. 19.220 increased by 40% =
20. 20.745 decreased by 60% =
21. 21.600 increased by 35% =
22. 22.144 decreased by 75% =
23. 23.44 decreased by 50% =
24. 24.280 decreased by 35% =
25. 25.65 increased by 60% =
26. 26.420 increased by 40% =
27. 27.408 decreased by 25% =
28. 28.175 decreased by 12% =
29. 29.480 increased by 5% =
30. 30.360 decreased by 10% =
31. 31.220 increased by 10% =
32. 32.676 decreased by 50% =
33. 33.740 increased by 10% =
34. 34.375 increased by 8% =
35. 35.180 increased by 25% =
36. 36.185 decreased by 20% =
37. 37.380 increased by 40% =
38. 38.330 decreased by 10% =
39. 39.340 increased by 10% =
40. 40.725 increased by 40% =

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