Add 21/18 and 72/9
1st number: 1 3/18, 2nd number: 8 0/9
21/18 + 72/9 is 55/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 9 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 18 × 1 = 18,
21/18 = 21 × 1/18 × 1 = 21/18 - Likewise, for the 2nd fraction, since 9 × 2 = 18,
72/9 = 72 × 2/9 × 2 = 144/18 - Add the two like fractions:
21/18 + 144/18 = 21 + 144/18 = 165/18 - 165/18 simplified gives 55/6
- So, 21/18 + 72/9 = 55/6
In mixed form: 91/6
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