Subtract 9/70 from 4/50
4/50 - 9/70 is -17/350.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 70 is 350
Next, find the equivalent fraction of both fractional numbers with denominator 350 - For the 1st fraction, since 50 × 7 = 350,
4/50 = 4 × 7/50 × 7 = 28/350 - Likewise, for the 2nd fraction, since 70 × 5 = 350,
9/70 = 9 × 5/70 × 5 = 45/350 - Subtract the two like fractions:
28/350 - 45/350 = 28 - 45/350 = -17/350
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/50-9/70 4/50-18/70 12/50-9/70 4/50-27/70 20/50-9/70 4/50-45/70 28/50-9/70 4/50-63/70