Add 90/70 and 84/12
1st number: 1 20/70, 2nd number: 7 0/12
90/70 + 84/12 is 58/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 12 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 70 × 6 = 420,
90/70 = 90 × 6/70 × 6 = 540/420 - Likewise, for the 2nd fraction, since 12 × 35 = 420,
84/12 = 84 × 35/12 × 35 = 2940/420 - Add the two like fractions:
540/420 + 2940/420 = 540 + 2940/420 = 3480/420 - 3480/420 simplified gives 58/7
- So, 90/70 + 84/12 = 58/7
In mixed form: 82/7
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