Subtract 12/30 from 27/28, Solve 27/28

Subtract 12/30 from 27/28

27/28 - 12/30 is 79/140.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 30 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 28 × 15 = 420,
27/28 = 27 × 15/28 × 15 = 405/420
Likewise, for the 2nd fraction, since 30 × 14 = 420,
12/30 = 12 × 14/30 × 14 = 168/420
Subtract the two like fractions:
405/420 - 168/420 = 405 - 168/420 = 237/420
After reducing the fraction, the answer is 79/140

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