Subtract 1/54 from 45/42, Solve 1 3/42

Subtract 1/54 from 45/42

1^st number: 1 3/42, 2^nd number: 1/54

45/42 - 1/54 is 199/189.

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,
45/42 = 45 × 9/42 × 9 = 405/378
Likewise, for the 2nd fraction, since 54 × 7 = 378,
1/54 = 1 × 7/54 × 7 = 7/378
Subtract the two like fractions:
405/378 - 7/378 = 405 - 7/378 = 398/378
After reducing the fraction, the answer is 199/189
In mixed form: 110/189

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