Subtract 28/9 from 20/4
1st number: 5 0/4, 2nd number: 3 1/9
20/4 - 28/9 is 17/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 9 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 4 × 9 = 36,
20/4 = 20 × 9/4 × 9 = 180/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
28/9 = 28 × 4/9 × 4 = 112/36 - Subtract the two like fractions:
180/36 - 112/36 = 180 - 112/36 = 68/36 - After reducing the fraction, the answer is 17/9
- In mixed form: 18/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/4-28/9 20/4-56/9 20/8-28/9 20/4-28/18 60/4-28/9 20/4-84/9 20/12-28/9 20/4-28/27 20/4-28/45 20/28-28/9 20/4-28/63