Add 1/54 and 7/21
1/54 + 7/21 is 19/54.
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,
1/54 = 1 × 7/54 × 7 = 7/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
7/21 = 7 × 18/21 × 18 = 126/378 - Add the two like fractions:
7/378 + 126/378 = 7 + 126/378 = 133/378 - 133/378 simplified gives 19/54
- So, 1/54 + 7/21 = 19/54
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