Add 30/18 and 90/42
1st number: 1 12/18, 2nd number: 2 6/42
30/18 + 90/42 is 80/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
30/18 = 30 × 7/18 × 7 = 210/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
90/42 = 90 × 3/42 × 3 = 270/126 - Add the two like fractions:
210/126 + 270/126 = 210 + 270/126 = 480/126 - 480/126 simplified gives 80/21
- So, 30/18 + 90/42 = 80/21
In mixed form: 317/21
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