Subtract 28/80 from 4/15
4/15 - 28/80 is -1/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 15 × 16 = 240,
4/15 = 4 × 16/15 × 16 = 64/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
28/80 = 28 × 3/80 × 3 = 84/240 - Subtract the two like fractions:
64/240 - 84/240 = 64 - 84/240 = -20/240 - After reducing the fraction, the answer is -1/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/15-28/80 4/15-56/80 4/30-28/80 12/15-28/80 4/15-84/80 4/45-28/80 20/15-28/80 4/75-28/80 28/15-28/80