Add 81/18 and 42/7
1st number: 4 9/18, 2nd number: 6 0/7
81/18 + 42/7 is 21/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 7 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
81/18 = 81 × 7/18 × 7 = 567/126 - Likewise, for the 2nd fraction, since 7 × 18 = 126,
42/7 = 42 × 18/7 × 18 = 756/126 - Add the two like fractions:
567/126 + 756/126 = 567 + 756/126 = 1323/126 - 1323/126 simplified gives 21/2
- So, 81/18 + 42/7 = 21/2
In mixed form: 101/2
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