Subtract 70/8 from 9/7
1st number: 1 2/7, 2nd number: 8 6/8
9/7 - 70/8 is -209/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 8 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 7 × 8 = 56,
9/7 = 9 × 8/7 × 8 = 72/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
70/8 = 70 × 7/8 × 7 = 490/56 - Subtract the two like fractions:
72/56 - 490/56 = 72 - 490/56 = -418/56 - After reducing the fraction, the answer is -209/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/7-70/8 9/14-70/8 9/7-70/16 27/7-70/8 9/21-70/8 9/7-70/24 45/7-70/8 9/35-70/8 9/7-70/40 63/7-70/8 9/49-70/8 9/7-70/56