Subtract 3/50 from 20/70
20/70 - 3/50 is 79/350.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 50 is 350
Next, find the equivalent fraction of both fractional numbers with denominator 350 - For the 1st fraction, since 70 × 5 = 350,
20/70 = 20 × 5/70 × 5 = 100/350 - Likewise, for the 2nd fraction, since 50 × 7 = 350,
3/50 = 3 × 7/50 × 7 = 21/350 - Subtract the two like fractions:
100/350 - 21/350 = 100 - 21/350 = 79/350
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/70-3/50 20/70-6/50 60/70-3/50 20/70-9/50 20/70-15/50 20/70-21/50