Subtract 90/9 from 49/72
1st number: 49/72, 2nd number: 10 0/9
49/72 - 90/9 is -671/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 9 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
49/72 = 49 × 1/72 × 1 = 49/72 - Likewise, for the 2nd fraction, since 9 × 8 = 72,
90/9 = 90 × 8/9 × 8 = 720/72 - Subtract the two like fractions:
49/72 - 720/72 = 49 - 720/72 = -671/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/72-90/9 49/72-90/18 49/72-90/27 49/72-90/45 49/72-90/63