Add 48/12 and 90/72, Solve 4 0/12 + 1 18/72 as a fraction

Add 48/12 and 90/72

1^st number: 4 0/12, 2^nd number: 1 18/72

48/12 + 90/72 is 21/4.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 72 is 72

Next, find the equivalent fraction of both fractional numbers with denominator 72
For the 1st fraction, since 12 × 6 = 72,
48/12 = 48 × 6/12 × 6 = 288/72
Likewise, for the 2nd fraction, since 72 × 1 = 72,
90/72 = 90 × 1/72 × 1 = 90/72
Add the two like fractions:
288/72 + 90/72 = 288 + 90/72 = 378/72
378/72 simplified gives 21/4
So, 48/12 + 90/72 = 21/4
In mixed form: 51/4

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