Subtract 21/12 from 60/18, Solve 3 6/18

Subtract 21/12 from 60/18

1^st number: 3 6/18, 2^nd number: 1 9/12

60/18 - 21/12 is 19/12.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 12 is 36

Next, find the equivalent fraction of both fractional numbers with denominator 36
For the 1st fraction, since 18 × 2 = 36,
60/18 = 60 × 2/18 × 2 = 120/36
Likewise, for the 2nd fraction, since 12 × 3 = 36,
21/12 = 21 × 3/12 × 3 = 63/36
Subtract the two like fractions:
120/36 - 63/36 = 120 - 63/36 = 57/36
After reducing the fraction, the answer is 19/12
In mixed form: 17/12

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