Subtract 72/15 from 90/6
1st number: 15 0/6, 2nd number: 4 12/15
90/6 - 72/15 is 51/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 15 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 6 × 5 = 30,
90/6 = 90 × 5/6 × 5 = 450/30 - Likewise, for the 2nd fraction, since 15 × 2 = 30,
72/15 = 72 × 2/15 × 2 = 144/30 - Subtract the two like fractions:
450/30 - 144/30 = 450 - 144/30 = 306/30 - After reducing the fraction, the answer is 51/5
- In mixed form: 101/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12-72/15 90/6-72/30 90/18-72/15 90/6-72/45 90/30-72/15 90/6-72/75 90/42-72/15