Subtract 12/42 from 42/8, Solve 5 2/8

Subtract 12/42 from 42/8

1^st number: 5 2/8, 2^nd number: 12/42

42/8 - 12/42 is 139/28.

Find the least common denominator or LCM of the two denominators:
LCM of 8 and 42 is 168

Next, find the equivalent fraction of both fractional numbers with denominator 168
For the 1st fraction, since 8 × 21 = 168,
42/8 = 42 × 21/8 × 21 = 882/168
Likewise, for the 2nd fraction, since 42 × 4 = 168,
12/42 = 12 × 4/42 × 4 = 48/168
Subtract the two like fractions:
882/168 - 48/168 = 882 - 48/168 = 834/168
After reducing the fraction, the answer is 139/28
In mixed form: 427/28

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