Add 42/12 and 72/18
1st number: 3 6/12, 2nd number: 4 0/18
42/12 + 72/18 is 15/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 18 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 12 × 3 = 36,
42/12 = 42 × 3/12 × 3 = 126/36 - Likewise, for the 2nd fraction, since 18 × 2 = 36,
72/18 = 72 × 2/18 × 2 = 144/36 - Add the two like fractions:
126/36 + 144/36 = 126 + 144/36 = 270/36 - 270/36 simplified gives 15/2
- So, 42/12 + 72/18 = 15/2
In mixed form: 71/2
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