Subtract 75/54 from 75/42, Solve 1 33/42

Subtract 75/54 from 75/42

1^st number: 1 33/42, 2^nd number: 1 21/54

75/42 - 75/54 is 25/63.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 54 is 378

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 42 × 9 = 378,
75/42 = 75 × 9/42 × 9 = 675/378
Likewise, for the 2nd fraction, since 54 × 7 = 378,
75/54 = 75 × 7/54 × 7 = 525/378
Subtract the two like fractions:
675/378 - 525/378 = 675 - 525/378 = 150/378
After reducing the fraction, the answer is 25/63

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