Subtract 28/70 from 3/7
3/7 - 28/70 is 1/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 70 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 7 × 10 = 70,
3/7 = 3 × 10/7 × 10 = 30/70 - Likewise, for the 2nd fraction, since 70 × 1 = 70,
28/70 = 28 × 1/70 × 1 = 28/70 - Subtract the two like fractions:
30/70 - 28/70 = 30 - 28/70 = 2/70 - After reducing the fraction, the answer is 1/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/7-28/70 3/7-56/70 3/14-28/70 9/7-28/70 3/7-84/70 3/21-28/70 15/7-28/70 3/35-28/70 21/7-28/70 3/49-28/70