Subtract 9/70 from 3/28
3/28 - 9/70 is -3/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
3/28 = 3 × 5/28 × 5 = 15/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
9/70 = 9 × 2/70 × 2 = 18/140 - Subtract the two like fractions:
15/140 - 18/140 = 15 - 18/140 = -3/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/28-9/70 3/28-18/70 3/56-9/70 9/28-9/70 3/28-27/70 3/84-9/70 15/28-9/70 3/28-45/70 21/28-9/70 3/28-63/70