Subtract 15/54 from 1/7, Solve 1/7

Subtract 15/54 from 1/7

1/7 - 15/54 is -17/126.

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,
1/7 = 1 × 54/7 × 54 = 54/378
Likewise, for the 2nd fraction, since 54 × 7 = 378,
15/54 = 15 × 7/54 × 7 = 105/378
Subtract the two like fractions:
54/378 - 105/378 = 54 - 105/378 = -51/378
After reducing the fraction, the answer is -17/126

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