Add 42/12 and 90/15
1st number: 3 6/12, 2nd number: 6 0/15
42/12 + 90/15 is 19/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
42/12 = 42 × 5/12 × 5 = 210/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
90/15 = 90 × 4/15 × 4 = 360/60 - Add the two like fractions:
210/60 + 360/60 = 210 + 360/60 = 570/60 - 570/60 simplified gives 19/2
- So, 42/12 + 90/15 = 19/2
In mixed form: 91/2
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