Subtract 84/72 from 7/9
1st number: 7/9, 2nd number: 1 12/72
7/9 - 84/72 is -7/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 9 × 8 = 72,
7/9 = 7 × 8/9 × 8 = 56/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
84/72 = 84 × 1/72 × 1 = 84/72 - Subtract the two like fractions:
56/72 - 84/72 = 56 - 84/72 = -28/72 - After reducing the fraction, the answer is -7/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/9-84/72 7/18-84/72 21/9-84/72 7/27-84/72 35/9-84/72 7/45-84/72 49/9-84/72 7/63-84/72