Add 21/15 and 30/5, Solve 1 6/15 + 6 0/5 as a fraction

Add 21/15 and 30/5

1^st number: 1 6/15, 2^nd number: 6 0/5

21/15 + 30/5 is 37/5.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 5 is 15

Next, find the equivalent fraction of both fractional numbers with denominator 15
For the 1st fraction, since 15 × 1 = 15,
21/15 = 21 × 1/15 × 1 = 21/15
Likewise, for the 2nd fraction, since 5 × 3 = 15,
30/5 = 30 × 3/5 × 3 = 90/15
Add the two like fractions:
21/15 + 90/15 = 21 + 90/15 = 111/15
111/15 simplified gives 37/5
So, 21/15 + 30/5 = 37/5
In mixed form: 72/5

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