Subtract 3/20 from 72/28
1st number: 2 16/28, 2nd number: 3/20
72/28 - 3/20 is 339/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
72/28 = 72 × 5/28 × 5 = 360/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
3/20 = 3 × 7/20 × 7 = 21/140 - Subtract the two like fractions:
360/140 - 21/140 = 360 - 21/140 = 339/140 - In mixed form: 259/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/28-6/20 72/56-3/20 72/28-3/40 72/28-9/20 72/84-3/20 72/28-3/60 72/28-15/20 72/28-21/20