Subtract 1/45 from 90/42, Solve 2 6/42

Subtract 1/45 from 90/42

1^st number: 2 6/42, 2^nd number: 1/45

90/42 - 1/45 is 668/315.

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,
90/42 = 90 × 15/42 × 15 = 1350/630
Likewise, for the 2nd fraction, since 45 × 14 = 630,
1/45 = 1 × 14/45 × 14 = 14/630
Subtract the two like fractions:
1350/630 - 14/630 = 1350 - 14/630 = 1336/630
After reducing the fraction, the answer is 668/315
In mixed form: 238/315

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