Add 54/42 and 49/28, Solve 1 12/42 + 1 21/28 as a fraction

Add 54/42 and 49/28

1^st number: 1 12/42, 2^nd number: 1 21/28

54/42 + 49/28 is 85/28.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 28 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 42 × 2 = 84,
54/42 = 54 × 2/42 × 2 = 108/84
Likewise, for the 2nd fraction, since 28 × 3 = 84,
49/28 = 49 × 3/28 × 3 = 147/84
Add the two like fractions:
108/84 + 147/84 = 108 + 147/84 = 255/84
255/84 simplified gives 85/28
So, 54/42 + 49/28 = 85/28
In mixed form: 31/28

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