Subtract 9/27 from 12/5, Solve 2 2/5

Subtract 9/27 from 12/5

1^st number: 2 2/5, 2^nd number: 9/27

12/5 - 9/27 is 31/15.

Find the least common denominator or LCM of the two denominators:
LCM of 5 and 27 is 135

Next, find the equivalent fraction of both fractional numbers with denominator 135
For the 1st fraction, since 5 × 27 = 135,
12/5 = 12 × 27/5 × 27 = 324/135
Likewise, for the 2nd fraction, since 27 × 5 = 135,
9/27 = 9 × 5/27 × 5 = 45/135
Subtract the two like fractions:
324/135 - 45/135 = 324 - 45/135 = 279/135
After reducing the fraction, the answer is 31/15
In mixed form: 21/15

MathStep (Works offline)

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