Subtract 42/72 from 56/18, Solve 3 2/18

Subtract 42/72 from 56/18

1^st number: 3 2/18, 2^nd number: 42/72

56/18 - 42/72 is 91/36.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 72 is 72

Next, find the equivalent fraction of both fractional numbers with denominator 72
For the 1st fraction, since 18 × 4 = 72,
56/18 = 56 × 4/18 × 4 = 224/72
Likewise, for the 2nd fraction, since 72 × 1 = 72,
42/72 = 42 × 1/72 × 1 = 42/72
Subtract the two like fractions:
224/72 - 42/72 = 224 - 42/72 = 182/72
After reducing the fraction, the answer is 91/36
In mixed form: 219/36

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