Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 349 · 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 8% =
2. 2.632 decreased by 50% =
3. 3.500 increased by 35% =
4. 4.280 increased by 20% =
5. 5.520 decreased by 35% =
6. 6.180 decreased by 5% =
7. 7.276 increased by 25% =
8. 8.510 decreased by 60% =
9. 9.620 increased by 15% =
10. 10.680 increased by 35% =
11. 11.800 increased by 12% =
12. 12.220 increased by 5% =
13. 13.100 increased by 5% =
14. 14.300 decreased by 50% =
15. 15.250 decreased by 12% =
16. 16.690 decreased by 10% =
17. 17.515 decreased by 20% =
18. 18.400 increased by 15% =
19. 19.260 increased by 30% =
20. 20.220 decreased by 5% =
21. 21.620 increased by 15% =
22. 22.788 increased by 25% =
23. 23.472 decreased by 25% =
24. 24.220 increased by 30% =
25. 25.284 decreased by 75% =
26. 26.275 decreased by 12% =
27. 27.132 decreased by 50% =
28. 28.385 decreased by 20% =
29. 29.325 increased by 12% =
30. 30.195 increased by 20% =
31. 31.408 decreased by 75% =
32. 32.680 increased by 5% =
33. 33.76 increased by 75% =
34. 34.300 decreased by 35% =
35. 35.100 increased by 12% =
36. 36.90 increased by 30% =
37. 37.500 increased by 12% =
38. 38.740 increased by 5% =
39. 39.275 increased by 12% =
40. 40.580 decreased by 5% =

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