Add 5/21 and 56/15
1st number: 5/21, 2nd number: 3 11/15
5/21 + 56/15 is 139/35.
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,
5/21 = 5 × 5/21 × 5 = 25/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
56/15 = 56 × 7/15 × 7 = 392/105 - Add the two like fractions:
25/105 + 392/105 = 25 + 392/105 = 417/105 - 417/105 simplified gives 139/35
- So, 5/21 + 56/15 = 139/35
In mixed form: 334/35
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