Subtract 63/7 from 70/9
1st number: 7 7/9, 2nd number: 9 0/7
70/9 - 63/7 is -11/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 7 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
70/9 = 70 × 7/9 × 7 = 490/63 - Likewise, for the 2nd fraction, since 7 × 9 = 63,
63/7 = 63 × 9/7 × 9 = 567/63 - Subtract the two like fractions:
490/63 - 567/63 = 490 - 567/63 = -77/63 - After reducing the fraction, the answer is -11/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/18-63/7 70/9-63/14 70/27-63/7 70/9-63/21 70/45-63/7 70/9-63/35 70/63-63/7 70/9-63/49