Add 7/15 and 81/28, Solve 7/15 + 2 25/28 as a fraction

Add 7/15 and 81/28

1^st number: 7/15, 2^nd number: 2 25/28

7/15 + 81/28 is 1411/420.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 28 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 15 × 28 = 420,
7/15 = 7 × 28/15 × 28 = 196/420
Likewise, for the 2nd fraction, since 28 × 15 = 420,
81/28 = 81 × 15/28 × 15 = 1215/420
Add the two like fractions:
196/420 + 1215/420 = 196 + 1215/420 = 1411/420
So, 7/15 + 81/28 = 1411/420
In mixed form: 3151/420

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