Add 84/12 and 21/15
1st number: 7 0/12, 2nd number: 1 6/15
84/12 + 21/15 is 42/5.
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,
84/12 = 84 × 5/12 × 5 = 420/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
21/15 = 21 × 4/15 × 4 = 84/60 - Add the two like fractions:
420/60 + 84/60 = 420 + 84/60 = 504/60 - 504/60 simplified gives 42/5
- So, 84/12 + 21/15 = 42/5
In mixed form: 82/5
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