Add 60/15 and 21/12, Solve 4 0/15 + 1 9/12 as a fraction

Add 60/15 and 21/12

1^st number: 4 0/15, 2^nd number: 1 9/12

60/15 + 21/12 is 23/4.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 12 is 60

Next, find the equivalent fraction of both fractional numbers with denominator 60
For the 1st fraction, since 15 × 4 = 60,
60/15 = 60 × 4/15 × 4 = 240/60
Likewise, for the 2nd fraction, since 12 × 5 = 60,
21/12 = 21 × 5/12 × 5 = 105/60
Add the two like fractions:
240/60 + 105/60 = 240 + 105/60 = 345/60
345/60 simplified gives 23/4
So, 60/15 + 21/12 = 23/4
In mixed form: 53/4

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