Add 21/80 and 4/49, Solve 21/80 + 4/49 as a fraction

Add 21/80 and 4/49

21/80 + 4/49 is 1349/3920.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 49 is 3920

Next, find the equivalent fraction of both fractional numbers with denominator 3920
For the 1st fraction, since 80 × 49 = 3920,
21/80 = 21 × 49/80 × 49 = 1029/3920
Likewise, for the 2nd fraction, since 49 × 80 = 3920,
4/49 = 4 × 80/49 × 80 = 320/3920
Add the two like fractions:
1029/3920 + 320/3920 = 1029 + 320/3920 = 1349/3920
So, 21/80 + 4/49 = 1349/3920

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