Add 7/54 and 72/21
1st number: 7/54, 2nd number: 3 9/21
7/54 + 72/21 is 1345/378.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 21 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
7/54 = 7 × 7/54 × 7 = 49/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
72/21 = 72 × 18/21 × 18 = 1296/378 - Add the two like fractions:
49/378 + 1296/378 = 49 + 1296/378 = 1345/378 - So, 7/54 + 72/21 = 1345/378
In mixed form: 3211/378
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