Add 36/10 and 90/21, Solve 3 6/10 + 4 6/21 as a fraction

Add 36/10 and 90/21

1^st number: 3 6/10, 2^nd number: 4 6/21

36/10 + 90/21 is 276/35.

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

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 10 × 21 = 210,
36/10 = 36 × 21/10 × 21 = 756/210
Likewise, for the 2nd fraction, since 21 × 10 = 210,
90/21 = 90 × 10/21 × 10 = 900/210
Add the two like fractions:
756/210 + 900/210 = 756 + 900/210 = 1656/210
1656/210 simplified gives 276/35
So, 36/10 + 90/21 = 276/35
In mixed form: 731/35

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