Add 27/21 and 54/15
1st number: 1 6/21, 2nd number: 3 9/15
27/21 + 54/15 is 171/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 15 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
27/21 = 27 × 5/21 × 5 = 135/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
54/15 = 54 × 7/15 × 7 = 378/105 - Add the two like fractions:
135/105 + 378/105 = 135 + 378/105 = 513/105 - 513/105 simplified gives 171/35
- So, 27/21 + 54/15 = 171/35
In mixed form: 431/35
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