Subtract 90/42 from 27/16, Solve 1 11/16

Subtract 90/42 from 27/16

1^st number: 1 11/16, 2^nd number: 2 6/42

27/16 - 90/42 is -51/112.

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

Next, find the equivalent fraction of both fractional numbers with denominator 336
For the 1st fraction, since 16 × 21 = 336,
27/16 = 27 × 21/16 × 21 = 567/336
Likewise, for the 2nd fraction, since 42 × 8 = 336,
90/42 = 90 × 8/42 × 8 = 720/336
Subtract the two like fractions:
567/336 - 720/336 = 567 - 720/336 = -153/336
After reducing the fraction, the answer is -51/112

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