Subtract 90/42 from 81/16, Solve 5 1/16

Subtract 90/42 from 81/16

1^st number: 5 1/16, 2^nd number: 2 6/42

81/16 - 90/42 is 327/112.

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,
81/16 = 81 × 21/16 × 21 = 1701/336
Likewise, for the 2nd fraction, since 42 × 8 = 336,
90/42 = 90 × 8/42 × 8 = 720/336
Subtract the two like fractions:
1701/336 - 720/336 = 1701 - 720/336 = 981/336
After reducing the fraction, the answer is 327/112
In mixed form: 2103/112

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