Subtract 5/30 from 72/15
1st number: 4 12/15, 2nd number: 5/30
72/15 - 5/30 is 139/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 30 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 15 × 2 = 30,
72/15 = 72 × 2/15 × 2 = 144/30 - Likewise, for the 2nd fraction, since 30 × 1 = 30,
5/30 = 5 × 1/30 × 1 = 5/30 - Subtract the two like fractions:
144/30 - 5/30 = 144 - 5/30 = 139/30 - In mixed form: 419/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/15-10/30 72/30-5/30 72/15-5/60 72/15-15/30 72/45-5/30 72/15-5/90 72/15-25/30 72/75-5/30 72/15-35/30