Add 12/21 and 7/5
1st number: 12/21, 2nd number: 1 2/5
12/21 + 7/5 is 69/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 5 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 5 × 21 = 105,
7/5 = 7 × 21/5 × 21 = 147/105 - Add the two like fractions:
60/105 + 147/105 = 60 + 147/105 = 207/105 - 207/105 simplified gives 69/35
- So, 12/21 + 7/5 = 69/35
In mixed form: 134/35
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