Add 90/6 and 9/21
1st number: 15 0/6, 2nd number: 9/21
90/6 + 9/21 is 108/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
90/6 = 90 × 7/6 × 7 = 630/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
9/21 = 9 × 2/21 × 2 = 18/42 - Add the two like fractions:
630/42 + 18/42 = 630 + 18/42 = 648/42 - 648/42 simplified gives 108/7
- So, 90/6 + 9/21 = 108/7
In mixed form: 153/7
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