Subtract 70/21 from 5/27, Solve 5/27

Subtract 70/21 from 5/27

1^st number: 5/27, 2^nd number: 3 7/21

5/27 - 70/21 is -85/27.

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,
5/27 = 5 × 7/27 × 7 = 35/189
Likewise, for the 2nd fraction, since 21 × 9 = 189,
70/21 = 70 × 9/21 × 9 = 630/189
Subtract the two like fractions:
35/189 - 630/189 = 35 - 630/189 = -595/189
After reducing the fraction, the answer is -85/27

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