Subtract 3/10 from 90/7
1st number: 12 6/7, 2nd number: 3/10
90/7 - 3/10 is 879/70.
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,
90/7 = 90 × 10/7 × 10 = 900/70 - Likewise, for the 2nd fraction, since 10 × 7 = 70,
3/10 = 3 × 7/10 × 7 = 21/70 - Subtract the two like fractions:
900/70 - 21/70 = 900 - 21/70 = 879/70 - In mixed form: 1239/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/7-6/10 90/14-3/10 90/7-3/20 90/7-9/10 90/21-3/10 90/7-3/30 90/7-15/10 90/35-3/10 90/7-3/50 90/7-21/10 90/49-3/10 90/7-3/70