Subtract 21/27 from 50/21, Solve 2 8/21

Subtract 21/27 from 50/21

1^st number: 2 8/21, 2^nd number: 21/27

50/21 - 21/27 is 101/63.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 27 is 189

Next, find the equivalent fraction of both fractional numbers with denominator 189
For the 1st fraction, since 21 × 9 = 189,
50/21 = 50 × 9/21 × 9 = 450/189
Likewise, for the 2nd fraction, since 27 × 7 = 189,
21/27 = 21 × 7/27 × 7 = 147/189
Subtract the two like fractions:
450/189 - 147/189 = 450 - 147/189 = 303/189
After reducing the fraction, the answer is 101/63
In mixed form: 138/63

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