Subtract 5/21 from 30/27, Solve 1 3/27

Subtract 5/21 from 30/27

1^st number: 1 3/27, 2^nd number: 5/21

30/27 - 5/21 is 55/63.

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

Next, find the equivalent fraction of both fractional numbers with denominator 189
For the 1st fraction, since 27 × 7 = 189,
30/27 = 30 × 7/27 × 7 = 210/189
Likewise, for the 2nd fraction, since 21 × 9 = 189,
5/21 = 5 × 9/21 × 9 = 45/189
Subtract the two like fractions:
210/189 - 45/189 = 210 - 45/189 = 165/189
After reducing the fraction, the answer is 55/63

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