Subtract 4/90 from 49/72
49/72 - 4/90 is 229/360.
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,
49/72 = 49 × 5/72 × 5 = 245/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
4/90 = 4 × 4/90 × 4 = 16/360 - Subtract the two like fractions:
245/360 - 16/360 = 245 - 16/360 = 229/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/72-4/90 49/72-8/90 49/72-12/90 49/72-20/90 49/72-28/90