Subtract 28/72 from 15/20
15/20 - 28/72 is 13/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 20 × 18 = 360,
15/20 = 15 × 18/20 × 18 = 270/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
28/72 = 28 × 5/72 × 5 = 140/360 - Subtract the two like fractions:
270/360 - 140/360 = 270 - 140/360 = 130/360 - After reducing the fraction, the answer is 13/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/20-28/72 15/20-56/72 15/40-28/72 45/20-28/72 15/20-84/72 15/60-28/72 75/20-28/72