Subtract 49/90 from 45/42, Solve 1 3/42

Subtract 49/90 from 45/42

1^st number: 1 3/42, 2^nd number: 49/90

45/42 - 49/90 is 166/315.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 90 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 42 × 15 = 630,
45/42 = 45 × 15/42 × 15 = 675/630
Likewise, for the 2nd fraction, since 90 × 7 = 630,
49/90 = 49 × 7/90 × 7 = 343/630
Subtract the two like fractions:
675/630 - 343/630 = 675 - 343/630 = 332/630
After reducing the fraction, the answer is 166/315

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