Add 54/21 and 36/10, Solve 2 12/21 + 3 6/10 as a fraction

Add 54/21 and 36/10

1^st number: 2 12/21, 2^nd number: 3 6/10

54/21 + 36/10 is 216/35.

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,
54/21 = 54 × 10/21 × 10 = 540/210
Likewise, for the 2nd fraction, since 10 × 21 = 210,
36/10 = 36 × 21/10 × 21 = 756/210
Add the two like fractions:
540/210 + 756/210 = 540 + 756/210 = 1296/210
1296/210 simplified gives 216/35
So, 54/21 + 36/10 = 216/35
In mixed form: 66/35

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