Subtract 49/70 from 28/54, Solve 28/54

Subtract 49/70 from 28/54

28/54 - 49/70 is -49/270.

Find the least common denominator or LCM of the two denominators:
LCM of 54 and 70 is 1890

Next, find the equivalent fraction of both fractional numbers with denominator 1890
For the 1st fraction, since 54 × 35 = 1890,
28/54 = 28 × 35/54 × 35 = 980/1890
Likewise, for the 2nd fraction, since 70 × 27 = 1890,
49/70 = 49 × 27/70 × 27 = 1323/1890
Subtract the two like fractions:
980/1890 - 1323/1890 = 980 - 1323/1890 = -343/1890
After reducing the fraction, the answer is -49/270

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