Add 84/7 and 54/10, Solve 12 0/7 + 5 4/10 as a fraction

Add 84/7 and 54/10

1^st number: 12 0/7, 2^nd number: 5 4/10

84/7 + 54/10 is 87/5.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 10 is 70

Next, find the equivalent fraction of both fractional numbers with denominator 70
For the 1st fraction, since 7 × 10 = 70,
84/7 = 84 × 10/7 × 10 = 840/70
Likewise, for the 2nd fraction, since 10 × 7 = 70,
54/10 = 54 × 7/10 × 7 = 378/70
Add the two like fractions:
840/70 + 378/70 = 840 + 378/70 = 1218/70
1218/70 simplified gives 87/5
So, 84/7 + 54/10 = 87/5
In mixed form: 172/5

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