Subtract 20/9 from 18/56, Solve 18/56

Subtract 20/9 from 18/56

1^st number: 18/56, 2^nd number: 2 2/9

18/56 - 20/9 is -479/252.

Find the least common denominator or LCM of the two denominators:
LCM of 56 and 9 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 56 × 9 = 504,
18/56 = 18 × 9/56 × 9 = 162/504
Likewise, for the 2nd fraction, since 9 × 56 = 504,
20/9 = 20 × 56/9 × 56 = 1120/504
Subtract the two like fractions:
162/504 - 1120/504 = 162 - 1120/504 = -958/504
After reducing the fraction, the answer is -479/252

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