Subtract 28/30 from 5/72
5/72 - 28/30 is -311/360.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 30 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
5/72 = 5 × 5/72 × 5 = 25/360 - Likewise, for the 2nd fraction, since 30 × 12 = 360,
28/30 = 28 × 12/30 × 12 = 336/360 - Subtract the two like fractions:
25/360 - 336/360 = 25 - 336/360 = -311/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/72-28/30 5/72-56/30 5/72-28/60 15/72-28/30 5/72-84/30 5/72-28/90 25/72-28/30 35/72-28/30