Subtract 18/27 from 96/21, Solve 4 12/21

Subtract 18/27 from 96/21

1^st number: 4 12/21, 2^nd number: 18/27

96/21 - 18/27 is 82/21.

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,
96/21 = 96 × 9/21 × 9 = 864/189
Likewise, for the 2nd fraction, since 27 × 7 = 189,
18/27 = 18 × 7/27 × 7 = 126/189
Subtract the two like fractions:
864/189 - 126/189 = 864 - 126/189 = 738/189
After reducing the fraction, the answer is 82/21
In mixed form: 319/21

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