Subtract 7/45 from 18/75
18/75 - 7/45 is 19/225.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 45 is 225
Next, find the equivalent fraction of both fractional numbers with denominator 225 - For the 1st fraction, since 75 × 3 = 225,
18/75 = 18 × 3/75 × 3 = 54/225 - Likewise, for the 2nd fraction, since 45 × 5 = 225,
7/45 = 7 × 5/45 × 5 = 35/225 - Subtract the two like fractions:
54/225 - 35/225 = 54 - 35/225 = 19/225
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/75-7/45 18/75-14/45 18/75-7/90 54/75-7/45 18/75-21/45 90/75-7/45 18/75-35/45 18/75-49/45