Subtract 1/45 from 28/12, Solve 2 4/12

Subtract 1/45 from 28/12

1^st number: 2 4/12, 2^nd number: 1/45

28/12 - 1/45 is 104/45.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 45 is 180

Next, find the equivalent fraction of both fractional numbers with denominator 180
For the 1st fraction, since 12 × 15 = 180,
28/12 = 28 × 15/12 × 15 = 420/180
Likewise, for the 2nd fraction, since 45 × 4 = 180,
1/45 = 1 × 4/45 × 4 = 4/180
Subtract the two like fractions:
420/180 - 4/180 = 420 - 4/180 = 416/180
After reducing the fraction, the answer is 104/45
In mixed form: 214/45

MathStep (Works offline)

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