Subtract 7/30 from 90/7
1st number: 12 6/7, 2nd number: 7/30
90/7 - 7/30 is 2651/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 7 × 30 = 210,
90/7 = 90 × 30/7 × 30 = 2700/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
7/30 = 7 × 7/30 × 7 = 49/210 - Subtract the two like fractions:
2700/210 - 49/210 = 2700 - 49/210 = 2651/210 - In mixed form: 12131/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/7-14/30 90/14-7/30 90/7-7/60 90/7-21/30 90/21-7/30 90/7-7/90 90/7-35/30 90/35-7/30 90/7-49/30 90/49-7/30