Subtract 7/25 from 20/45
20/45 - 7/25 is 37/225.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 25 is 225
Next, find the equivalent fraction of both fractional numbers with denominator 225 - For the 1st fraction, since 45 × 5 = 225,
20/45 = 20 × 5/45 × 5 = 100/225 - Likewise, for the 2nd fraction, since 25 × 9 = 225,
7/25 = 7 × 9/25 × 9 = 63/225 - Subtract the two like fractions:
100/225 - 63/225 = 100 - 63/225 = 37/225
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/45-7/25 20/45-14/25 20/90-7/25 20/45-7/50 60/45-7/25 20/45-21/25 20/45-7/75 20/45-35/25 20/45-49/25