Subtract 28/70 from 1/7
1/7 - 28/70 is -9/35.
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,
1/7 = 1 × 10/7 × 10 = 10/70 - Likewise, for the 2nd fraction, since 70 × 1 = 70,
28/70 = 28 × 1/70 × 1 = 28/70 - Subtract the two like fractions:
10/70 - 28/70 = 10 - 28/70 = -18/70 - After reducing the fraction, the answer is -9/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/7-28/70 1/7-56/70 1/14-28/70 3/7-28/70 1/7-84/70 1/21-28/70 5/7-28/70 1/35-28/70 1/49-28/70