Subtract 5/45 from 21/75
21/75 - 5/45 is 38/225.
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,
21/75 = 21 × 3/75 × 3 = 63/225 - Likewise, for the 2nd fraction, since 45 × 5 = 225,
5/45 = 5 × 5/45 × 5 = 25/225 - Subtract the two like fractions:
63/225 - 25/225 = 63 - 25/225 = 38/225
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/75-5/45 21/75-10/45 21/75-5/90 63/75-5/45 21/75-15/45 21/75-25/45 21/75-35/45