Subtract 56/45 from 7/42, Solve 7/42

Subtract 56/45 from 7/42

1^st number: 7/42, 2^nd number: 1 11/45

7/42 - 56/45 is -97/90.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 45 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 42 × 15 = 630,
7/42 = 7 × 15/42 × 15 = 105/630
Likewise, for the 2nd fraction, since 45 × 14 = 630,
56/45 = 56 × 14/45 × 14 = 784/630
Subtract the two like fractions:
105/630 - 784/630 = 105 - 784/630 = -679/630
After reducing the fraction, the answer is -97/90

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