Subtract 45/42 from 5/18, Solve 5/18

Subtract 45/42 from 5/18

1^st number: 5/18, 2^nd number: 1 3/42

5/18 - 45/42 is -50/63.

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,
5/18 = 5 × 7/18 × 7 = 35/126
Likewise, for the 2nd fraction, since 42 × 3 = 126,
45/42 = 45 × 3/42 × 3 = 135/126
Subtract the two like fractions:
35/126 - 135/126 = 35 - 135/126 = -100/126
After reducing the fraction, the answer is -50/63

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