Subtract 4/27 from 21/7, Solve 3 0/7

Subtract 4/27 from 21/7

1^st number: 3 0/7, 2^nd number: 4/27

21/7 - 4/27 is 77/27.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 27 is 189

Next, find the equivalent fraction of both fractional numbers with denominator 189
For the 1st fraction, since 7 × 27 = 189,
21/7 = 21 × 27/7 × 27 = 567/189
Likewise, for the 2nd fraction, since 27 × 7 = 189,
4/27 = 4 × 7/27 × 7 = 28/189
Subtract the two like fractions:
567/189 - 28/189 = 567 - 28/189 = 539/189
After reducing the fraction, the answer is 77/27
In mixed form: 223/27

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