Subtract 7/12 from 3/80
3/80 - 7/12 is -131/240.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 12 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 80 × 3 = 240,
3/80 = 3 × 3/80 × 3 = 9/240 - Likewise, for the 2nd fraction, since 12 × 20 = 240,
7/12 = 7 × 20/12 × 20 = 140/240 - Subtract the two like fractions:
9/240 - 140/240 = 9 - 140/240 = -131/240
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/80-7/12 3/80-14/12 3/80-7/24 9/80-7/12 3/80-21/12 3/80-7/36 15/80-7/12 3/80-35/12 3/80-7/60 21/80-7/12 3/80-49/12 3/80-7/84