Subtract 42/16 from 90/42, Solve 2 6/42

Subtract 42/16 from 90/42

1^st number: 2 6/42, 2^nd number: 2 10/16

90/42 - 42/16 is -27/56.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 16 is 336

Next, find the equivalent fraction of both fractional numbers with denominator 336
For the 1st fraction, since 42 × 8 = 336,
90/42 = 90 × 8/42 × 8 = 720/336
Likewise, for the 2nd fraction, since 16 × 21 = 336,
42/16 = 42 × 21/16 × 21 = 882/336
Subtract the two like fractions:
720/336 - 882/336 = 720 - 882/336 = -162/336
After reducing the fraction, the answer is -27/56

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