Add 42/30 and 21/12
1st number: 1 12/30, 2nd number: 1 9/12
42/30 + 21/12 is 63/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
42/30 = 42 × 2/30 × 2 = 84/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
21/12 = 21 × 5/12 × 5 = 105/60 - Add the two like fractions:
84/60 + 105/60 = 84 + 105/60 = 189/60 - 189/60 simplified gives 63/20
- So, 42/30 + 21/12 = 63/20
In mixed form: 33/20
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