how to add fractions
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We need a common denominator for 3, 4 and 5: 3×4×5=60 is the common denominator.

Now we express each fraction in terms of the common denominator 60:

1/4=15/60; 1/3=20/60; 1/5=12/60 so 2/5=24/60.

Now we add 15+20+24=59. So the sum is 59/60.

by Top Rated User (721k points)

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