Subtract 45/54 from 9/7, Solve 1 2/7

Subtract 45/54 from 9/7

1^st number: 1 2/7, 2^nd number: 45/54

9/7 - 45/54 is 19/42.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 54 is 378

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 7 × 54 = 378,
9/7 = 9 × 54/7 × 54 = 486/378
Likewise, for the 2nd fraction, since 54 × 7 = 378,
45/54 = 45 × 7/54 × 7 = 315/378
Subtract the two like fractions:
486/378 - 315/378 = 486 - 315/378 = 171/378
After reducing the fraction, the answer is 19/42

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