Subtract 42/27 from 42/2, Solve 21 0/2

Subtract 42/27 from 42/2

1^st number: 21 0/2, 2^nd number: 1 15/27

42/2 - 42/27 is 175/9.

Find the least common denominator or LCM of the two denominators:
LCM of 2 and 27 is 54

Next, find the equivalent fraction of both fractional numbers with denominator 54
For the 1st fraction, since 2 × 27 = 54,
42/2 = 42 × 27/2 × 27 = 1134/54
Likewise, for the 2nd fraction, since 27 × 2 = 54,
42/27 = 42 × 2/27 × 2 = 84/54
Subtract the two like fractions:
1134/54 - 84/54 = 1134 - 84/54 = 1050/54
After reducing the fraction, the answer is 175/9
In mixed form: 194/9

MathStep (Works offline)

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