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

Subtract 3/18 from 42/56

42/56 - 3/18 is 7/12.

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

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 56 × 9 = 504,
42/56 = 42 × 9/56 × 9 = 378/504
Likewise, for the 2nd fraction, since 18 × 28 = 504,
3/18 = 3 × 28/18 × 28 = 84/504
Subtract the two like fractions:
378/504 - 84/504 = 378 - 84/504 = 294/504
After reducing the fraction, the answer is 7/12

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