Subtract 8/36 from 27/21, Solve 1 6/21

Subtract 8/36 from 27/21

1^st number: 1 6/21, 2^nd number: 8/36

27/21 - 8/36 is 67/63.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 36 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 21 × 12 = 252,
27/21 = 27 × 12/21 × 12 = 324/252
Likewise, for the 2nd fraction, since 36 × 7 = 252,
8/36 = 8 × 7/36 × 7 = 56/252
Subtract the two like fractions:
324/252 - 56/252 = 324 - 56/252 = 268/252
After reducing the fraction, the answer is 67/63
In mixed form: 14/63

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