Subtract 72/45 from 5/18
1st number: 5/18, 2nd number: 1 27/45
5/18 - 72/45 is -119/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
5/18 = 5 × 5/18 × 5 = 25/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
72/45 = 72 × 2/45 × 2 = 144/90 - Subtract the two like fractions:
25/90 - 144/90 = 25 - 144/90 = -119/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/18-72/45 5/36-72/45 5/18-72/90 15/18-72/45 5/54-72/45 25/18-72/45 5/90-72/45 35/18-72/45