Subtract 27/28 from 12/70
12/70 - 27/28 is -111/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
12/70 = 12 × 2/70 × 2 = 24/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
27/28 = 27 × 5/28 × 5 = 135/140 - Subtract the two like fractions:
24/140 - 135/140 = 24 - 135/140 = -111/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/70-27/28 12/70-54/28 12/70-27/56 36/70-27/28 12/70-81/28 12/70-27/84 60/70-27/28 84/70-27/28