Add 21/42 and 21/18
1st number: 21/42, 2nd number: 1 3/18
21/42 + 21/18 is 5/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
21/42 = 21 × 3/42 × 3 = 63/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
21/18 = 21 × 7/18 × 7 = 147/126 - Add the two like fractions:
63/126 + 147/126 = 63 + 147/126 = 210/126 - 210/126 simplified gives 5/3
- So, 21/42 + 21/18 = 5/3
In mixed form: 12/3
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