Subtract 3/90 from 5/72
5/72 - 3/90 is 13/360.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 90 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 90 × 4 = 360,
3/90 = 3 × 4/90 × 4 = 12/360 - Subtract the two like fractions:
25/360 - 12/360 = 25 - 12/360 = 13/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/72-3/90 5/72-6/90 15/72-3/90 5/72-9/90 25/72-3/90 5/72-15/90 35/72-3/90 5/72-21/90