Subtract 9/15 from 3/72
3/72 - 9/15 is -67/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 15 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
3/72 = 3 × 5/72 × 5 = 15/360 - Likewise, for the 2nd fraction, since 15 × 24 = 360,
9/15 = 9 × 24/15 × 24 = 216/360 - Subtract the two like fractions:
15/360 - 216/360 = 15 - 216/360 = -201/360 - After reducing the fraction, the answer is -67/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/72-9/15 3/72-18/15 3/72-9/30 9/72-9/15 3/72-27/15 3/72-9/45 15/72-9/15 3/72-45/15 3/72-9/75 21/72-9/15 3/72-63/15