Subtract 2/7 from 21/50
21/50 - 2/7 is 47/350.
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,
2/7 = 2 × 50/7 × 50 = 100/350 - Subtract the two like fractions:
147/350 - 100/350 = 147 - 100/350 = 47/350
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/50-2/7 21/50-4/7 21/50-2/14 63/50-2/7 21/50-6/7 21/50-2/21 21/50-10/7 21/50-2/35 21/50-14/7 21/50-2/49