Subtract 45/18 from 2/42, Solve 2/42

Subtract 45/18 from 2/42

1^st number: 2/42, 2^nd number: 2 9/18

2/42 - 45/18 is -103/42.

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

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 42 × 3 = 126,
2/42 = 2 × 3/42 × 3 = 6/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
45/18 = 45 × 7/18 × 7 = 315/126
Subtract the two like fractions:
6/126 - 315/126 = 6 - 315/126 = -309/126
After reducing the fraction, the answer is -103/42

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