Subtract 10/54 from 50/21, Solve 2 8/21

Subtract 10/54 from 50/21

1^st number: 2 8/21, 2^nd number: 10/54

50/21 - 10/54 is 415/189.

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,
50/21 = 50 × 18/21 × 18 = 900/378
Likewise, for the 2nd fraction, since 54 × 7 = 378,
10/54 = 10 × 7/54 × 7 = 70/378
Subtract the two like fractions:
900/378 - 70/378 = 900 - 70/378 = 830/378
After reducing the fraction, the answer is 415/189
In mixed form: 237/189

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