Subtract 25/7 from 21/50
1st number: 21/50, 2nd number: 3 4/7
21/50 - 25/7 is -1103/350.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 7 is 350
Next, find the equivalent fraction of both fractional numbers with denominator 350 - For the 1st fraction, since 50 × 7 = 350,
21/50 = 21 × 7/50 × 7 = 147/350 - Likewise, for the 2nd fraction, since 7 × 50 = 350,
25/7 = 25 × 50/7 × 50 = 1250/350 - Subtract the two like fractions:
147/350 - 1250/350 = 147 - 1250/350 = -1103/350
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/50-25/7 21/50-50/7 21/50-25/14 63/50-25/7 21/50-75/7 21/50-25/21 21/50-25/35 21/50-25/49