Subtract 1/21 from 36/8, Solve 4 4/8

Subtract 1/21 from 36/8

1^st number: 4 4/8, 2^nd number: 1/21

36/8 - 1/21 is 187/42.

Find the least common denominator or LCM of the two denominators:
LCM of 8 and 21 is 168

Next, find the equivalent fraction of both fractional numbers with denominator 168
For the 1st fraction, since 8 × 21 = 168,
36/8 = 36 × 21/8 × 21 = 756/168
Likewise, for the 2nd fraction, since 21 × 8 = 168,
1/21 = 1 × 8/21 × 8 = 8/168
Subtract the two like fractions:
756/168 - 8/168 = 756 - 8/168 = 748/168
After reducing the fraction, the answer is 187/42
In mixed form: 419/42

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