Subtract 21/10 from 1/54, Solve 1/54

Subtract 21/10 from 1/54

1^st number: 1/54, 2^nd number: 2 1/10

1/54 - 21/10 is -281/135.

Find the least common denominator or LCM of the two denominators:
LCM of 54 and 10 is 270

Next, find the equivalent fraction of both fractional numbers with denominator 270
For the 1st fraction, since 54 × 5 = 270,
1/54 = 1 × 5/54 × 5 = 5/270
Likewise, for the 2nd fraction, since 10 × 27 = 270,
21/10 = 21 × 27/10 × 27 = 567/270
Subtract the two like fractions:
5/270 - 567/270 = 5 - 567/270 = -562/270
After reducing the fraction, the answer is -281/135

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad