Subtract 10/5 from 90/72
1st number: 1 18/72, 2nd number: 2 0/5
90/72 - 10/5 is -3/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 5 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
90/72 = 90 × 5/72 × 5 = 450/360 - Likewise, for the 2nd fraction, since 5 × 72 = 360,
10/5 = 10 × 72/5 × 72 = 720/360 - Subtract the two like fractions:
450/360 - 720/360 = 450 - 720/360 = -270/360 - After reducing the fraction, the answer is -3/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/72-20/5 90/72-30/5 90/72-10/15 90/72-50/5 90/72-10/25 90/72-70/5 90/72-10/35