Subtract 63/9 from 90/7
1st number: 12 6/7, 2nd number: 7 0/9
90/7 - 63/9 is 41/7.
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,
90/7 = 90 × 9/7 × 9 = 810/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
63/9 = 63 × 7/9 × 7 = 441/63 - Subtract the two like fractions:
810/63 - 441/63 = 810 - 441/63 = 369/63 - After reducing the fraction, the answer is 41/7
- In mixed form: 56/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/14-63/9 90/7-63/18 90/21-63/9 90/7-63/27 90/35-63/9 90/7-63/45 90/49-63/9