Subtract 70/45 from 49/42, Solve 1 7/42

Subtract 70/45 from 49/42

1^st number: 1 7/42, 2^nd number: 1 25/45

49/42 - 70/45 is -7/18.

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,
49/42 = 49 × 15/42 × 15 = 735/630
Likewise, for the 2nd fraction, since 45 × 14 = 630,
70/45 = 70 × 14/45 × 14 = 980/630
Subtract the two like fractions:
735/630 - 980/630 = 735 - 980/630 = -245/630
After reducing the fraction, the answer is -7/18

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