Subtract 3/28 from 30/9, Solve 3 3/9

Subtract 3/28 from 30/9

1^st number: 3 3/9, 2^nd number: 3/28

30/9 - 3/28 is 271/84.

Find the least common denominator or LCM of the two denominators:
LCM of 9 and 28 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 9 × 28 = 252,
30/9 = 30 × 28/9 × 28 = 840/252
Likewise, for the 2nd fraction, since 28 × 9 = 252,
3/28 = 3 × 9/28 × 9 = 27/252
Subtract the two like fractions:
840/252 - 27/252 = 840 - 27/252 = 813/252
After reducing the fraction, the answer is 271/84
In mixed form: 319/84

MathStep (Works offline)

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