Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 287 · 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. 1.500 decreased by 60% =
2. 2.480 decreased by 20% =
3. 3.760 decreased by 30% =
4. 4.220 decreased by 15% =
5. 5.696 increased by 25% =
6. 6.416 decreased by 50% =
7. 7.520 decreased by 15% =
8. 8.320 increased by 15% =
9. 9.220 decreased by 35% =
10. 10.360 increased by 35% =
11. 11.190 decreased by 20% =
12. 12.295 decreased by 60% =
13. 13.625 increased by 12% =
14. 14.600 decreased by 25% =
15. 15.270 increased by 40% =
16. 16.70 decreased by 40% =
17. 17.570 increased by 30% =
18. 18.400 decreased by 12% =
19. 19.170 decreased by 30% =
20. 20.134 decreased by 50% =
21. 21.360 increased by 50% =
22. 22.612 decreased by 50% =
23. 23.260 decreased by 15% =
24. 24.220 increased by 5% =
25. 25.220 decreased by 60% =
26. 26.640 decreased by 10% =
27. 27.160 increased by 25% =
28. 28.206 increased by 50% =
29. 29.574 decreased by 50% =
30. 30.260 increased by 5% =
31. 31.260 increased by 15% =
32. 32.460 increased by 25% =
33. 33.260 decreased by 35% =
34. 34.400 increased by 25% =
35. 35.375 increased by 12% =
36. 36.435 increased by 60% =
37. 37.320 decreased by 60% =
38. 38.660 decreased by 40% =
39. 39.50 decreased by 12% =
40. 40.432 increased by 25% =

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