Add 15/18 and 3/42
15/18 + 3/42 is 19/21.
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,
15/18 = 15 × 7/18 × 7 = 105/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
3/42 = 3 × 3/42 × 3 = 9/126 - Add the two like fractions:
105/126 + 9/126 = 105 + 9/126 = 114/126 - 114/126 simplified gives 19/21
- So, 15/18 + 3/42 = 19/21
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