Subtract 90/56 from 3/18, Solve 3/18

Subtract 90/56 from 3/18

1^st number: 3/18, 2^nd number: 1 34/56

3/18 - 90/56 is -121/84.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 56 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 18 × 28 = 504,
3/18 = 3 × 28/18 × 28 = 84/504
Likewise, for the 2nd fraction, since 56 × 9 = 504,
90/56 = 90 × 9/56 × 9 = 810/504
Subtract the two like fractions:
84/504 - 810/504 = 84 - 810/504 = -726/504
After reducing the fraction, the answer is -121/84

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