Add 28/12 and 80/70
1st number: 2 4/12, 2nd number: 1 10/70
28/12 + 80/70 is 73/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 70 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 12 × 35 = 420,
28/12 = 28 × 35/12 × 35 = 980/420 - Likewise, for the 2nd fraction, since 70 × 6 = 420,
80/70 = 80 × 6/70 × 6 = 480/420 - Add the two like fractions:
980/420 + 480/420 = 980 + 480/420 = 1460/420 - 1460/420 simplified gives 73/21
- So, 28/12 + 80/70 = 73/21
In mixed form: 310/21
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