Subtract 1/27 from 70/20, Solve 3 10/20

Subtract 1/27 from 70/20

1^st number: 3 10/20, 2^nd number: 1/27

70/20 - 1/27 is 187/54.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 27 is 540

Next, find the equivalent fraction of both fractional numbers with denominator 540
For the 1st fraction, since 20 × 27 = 540,
70/20 = 70 × 27/20 × 27 = 1890/540
Likewise, for the 2nd fraction, since 27 × 20 = 540,
1/27 = 1 × 20/27 × 20 = 20/540
Subtract the two like fractions:
1890/540 - 20/540 = 1890 - 20/540 = 1870/540
After reducing the fraction, the answer is 187/54
In mixed form: 325/54

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