Subtract 45/80 from 4/15
4/15 - 45/80 is -71/240.
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,
45/80 = 45 × 3/80 × 3 = 135/240 - Subtract the two like fractions:
64/240 - 135/240 = 64 - 135/240 = -71/240
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/15-45/80 4/15-90/80 4/30-45/80 12/15-45/80 4/45-45/80 20/15-45/80 4/75-45/80 28/15-45/80