Add 12/21 and 45/15
1st number: 12/21, 2nd number: 3 0/15
12/21 + 45/15 is 25/7.
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,
12/21 = 12 × 5/21 × 5 = 60/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
45/15 = 45 × 7/15 × 7 = 315/105 - Add the two like fractions:
60/105 + 315/105 = 60 + 315/105 = 375/105 - 375/105 simplified gives 25/7
- So, 12/21 + 45/15 = 25/7
In mixed form: 34/7
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