Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 72 · 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. 1.452 increased by 75% =
2. 2.522 increased by 50% =
3. 3.755 decreased by 60% =
4. 4.315 decreased by 60% =
5. 5.595 increased by 20% =
6. 6.240 increased by 35% =
7. 7.120 increased by 35% =
8. 8.245 decreased by 40% =
9. 9.195 increased by 20% =
10. 10.320 increased by 15% =
11. 11.220 decreased by 20% =
12. 12.580 decreased by 15% =
13. 13.620 increased by 15% =
14. 14.240 increased by 35% =
15. 15.360 increased by 35% =
16. 16.70 increased by 10% =
17. 17.675 decreased by 12% =
18. 18.230 decreased by 40% =
19. 19.56 increased by 25% =
20. 20.150 decreased by 8% =
21. 21.160 increased by 15% =
22. 22.588 decreased by 75% =
23. 23.300 increased by 12% =
24. 24.284 decreased by 25% =
25. 25.740 increased by 40% =
26. 26.625 increased by 12% =
27. 27.220 increased by 15% =
28. 28.240 increased by 25% =
29. 29.220 decreased by 35% =
30. 30.520 decreased by 25% =
31. 31.212 increased by 25% =
32. 32.280 increased by 35% =
33. 33.425 increased by 12% =
34. 34.640 increased by 5% =
35. 35.200 increased by 12% =
36. 36.725 increased by 60% =
37. 37.150 increased by 60% =
38. 38.376 decreased by 75% =
39. 39.340 increased by 60% =
40. 40.570 increased by 10% =

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