Add 7/21 and 18/15
1st number: 7/21, 2nd number: 1 3/15
7/21 + 18/15 is 23/15.
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,
7/21 = 7 × 5/21 × 5 = 35/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
18/15 = 18 × 7/15 × 7 = 126/105 - Add the two like fractions:
35/105 + 126/105 = 35 + 126/105 = 161/105 - 161/105 simplified gives 23/15
- So, 7/21 + 18/15 = 23/15
In mixed form: 18/15
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