Subtract 12/72 from 28/18
1st number: 1 10/18, 2nd number: 12/72
28/18 - 12/72 is 25/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 18 × 4 = 72,
28/18 = 28 × 4/18 × 4 = 112/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
12/72 = 12 × 1/72 × 1 = 12/72 - Subtract the two like fractions:
112/72 - 12/72 = 112 - 12/72 = 100/72 - After reducing the fraction, the answer is 25/18
- In mixed form: 17/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/18-12/72 28/18-24/72 28/36-12/72 84/18-12/72 28/18-36/72 28/54-12/72 28/18-60/72 28/90-12/72 28/18-84/72