Add 4/15 and 80/21
1st number: 4/15, 2nd number: 3 17/21
4/15 + 80/21 is 428/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
4/15 = 4 × 7/15 × 7 = 28/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
80/21 = 80 × 5/21 × 5 = 400/105 - Add the two like fractions:
28/105 + 400/105 = 28 + 400/105 = 428/105 - So, 4/15 + 80/21 = 428/105
In mixed form: 48/105
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