Subtract 50/42 from 4/18, Solve 4/18

Subtract 50/42 from 4/18

1^st number: 4/18, 2^nd number: 1 8/42

4/18 - 50/42 is -61/63.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 42 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 18 × 7 = 126,
4/18 = 4 × 7/18 × 7 = 28/126
Likewise, for the 2nd fraction, since 42 × 3 = 126,
50/42 = 50 × 3/42 × 3 = 150/126
Subtract the two like fractions:
28/126 - 150/126 = 28 - 150/126 = -122/126
After reducing the fraction, the answer is -61/63

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