Subtract 1/72 from 90/36
1st number: 2 18/36, 2nd number: 1/72
90/36 - 1/72 is 179/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 36 × 2 = 72,
90/36 = 90 × 2/36 × 2 = 180/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
1/72 = 1 × 1/72 × 1 = 1/72 - Subtract the two like fractions:
180/72 - 1/72 = 180 - 1/72 = 179/72 - In mixed form: 235/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/36-2/72 90/72-1/72 90/36-3/72 90/36-5/72 90/36-7/72