Subtract 90/9 from 84/7
1st number: 12 0/7, 2nd number: 10 0/9
84/7 - 90/9 is 2/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,
84/7 = 84 × 9/7 × 9 = 756/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
90/9 = 90 × 7/9 × 7 = 630/63 - Subtract the two like fractions:
756/63 - 630/63 = 756 - 630/63 = 126/63 - After reducing the fraction, the answer is 2/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/14-90/9 84/7-90/18 84/21-90/9 84/7-90/27 84/35-90/9 84/7-90/45 84/49-90/9 84/7-90/63