Add 5/21 and 7/54
5/21 + 7/54 is 139/378.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 21 × 18 = 378,
5/21 = 5 × 18/21 × 18 = 90/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
7/54 = 7 × 7/54 × 7 = 49/378 - Add the two like fractions:
90/378 + 49/378 = 90 + 49/378 = 139/378 - So, 5/21 + 7/54 = 139/378
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