Add 90/12 and 20/7
1st number: 7 6/12, 2nd number: 2 6/7
90/12 + 20/7 is 145/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 7 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
90/12 = 90 × 7/12 × 7 = 630/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
20/7 = 20 × 12/7 × 12 = 240/84 - Add the two like fractions:
630/84 + 240/84 = 630 + 240/84 = 870/84 - 870/84 simplified gives 145/14
- So, 90/12 + 20/7 = 145/14
In mixed form: 105/14
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