Subtract 10/72 from 90/5
1st number: 18 0/5, 2nd number: 10/72
90/5 - 10/72 is 643/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 5 × 72 = 360,
90/5 = 90 × 72/5 × 72 = 6480/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
10/72 = 10 × 5/72 × 5 = 50/360 - Subtract the two like fractions:
6480/360 - 50/360 = 6480 - 50/360 = 6430/360 - After reducing the fraction, the answer is 643/36
- In mixed form: 1731/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/5-20/72 90/10-10/72 90/5-30/72 90/15-10/72 90/5-50/72 90/25-10/72 90/5-70/72 90/35-10/72