Subtract 7/45 from 45/18
1st number: 2 9/18, 2nd number: 7/45
45/18 - 7/45 is 211/90.
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,
45/18 = 45 × 5/18 × 5 = 225/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
7/45 = 7 × 2/45 × 2 = 14/90 - Subtract the two like fractions:
225/90 - 14/90 = 225 - 14/90 = 211/90 - In mixed form: 231/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/18-7/45 45/18-14/45 45/36-7/45 45/18-7/90 45/18-21/45 45/54-7/45 45/18-35/45 45/90-7/45 45/18-49/45