Add 54/21 and 30/7
1st number: 2 12/21, 2nd number: 4 2/7
54/21 + 30/7 is 48/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 7 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 21 × 1 = 21,
54/21 = 54 × 1/21 × 1 = 54/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
30/7 = 30 × 3/7 × 3 = 90/21 - Add the two like fractions:
54/21 + 90/21 = 54 + 90/21 = 144/21 - 144/21 simplified gives 48/7
- So, 54/21 + 30/7 = 48/7
In mixed form: 66/7
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