Subtract 9/10 from 81/7
1st number: 11 4/7, 2nd number: 9/10
81/7 - 9/10 is 747/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 10 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 7 × 10 = 70,
81/7 = 81 × 10/7 × 10 = 810/70 - Likewise, for the 2nd fraction, since 10 × 7 = 70,
9/10 = 9 × 7/10 × 7 = 63/70 - Subtract the two like fractions:
810/70 - 63/70 = 810 - 63/70 = 747/70 - In mixed form: 1047/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/7-18/10 81/14-9/10 81/7-9/20 81/7-27/10 81/21-9/10 81/7-9/30 81/7-45/10 81/35-9/10 81/7-9/50 81/7-63/10 81/49-9/10 81/7-9/70