Add 90/7 and 21/70
1st number: 12 6/7, 2nd number: 21/70
90/7 + 21/70 is 921/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 70 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 7 × 10 = 70,
90/7 = 90 × 10/7 × 10 = 900/70 - Likewise, for the 2nd fraction, since 70 × 1 = 70,
21/70 = 21 × 1/70 × 1 = 21/70 - Add the two like fractions:
900/70 + 21/70 = 900 + 21/70 = 921/70 - So, 90/7 + 21/70 = 921/70
In mixed form: 1311/70
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