Add 27/21 and 27/10, Solve 1 6/21 + 2 7/10 as a fraction

Add 27/21 and 27/10

1^st number: 1 6/21, 2^nd number: 2 7/10

27/21 + 27/10 is 279/70.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 10 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 21 × 10 = 210,
27/21 = 27 × 10/21 × 10 = 270/210
Likewise, for the 2nd fraction, since 10 × 21 = 210,
27/10 = 27 × 21/10 × 21 = 567/210
Add the two like fractions:
270/210 + 567/210 = 270 + 567/210 = 837/210
837/210 simplified gives 279/70
So, 27/21 + 27/10 = 279/70
In mixed form: 369/70

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