Subtract 50/7 from 90/30
1st number: 3 0/30, 2nd number: 7 1/7
90/30 - 50/7 is -29/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 7 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
90/30 = 90 × 7/30 × 7 = 630/210 - Likewise, for the 2nd fraction, since 7 × 30 = 210,
50/7 = 50 × 30/7 × 30 = 1500/210 - Subtract the two like fractions:
630/210 - 1500/210 = 630 - 1500/210 = -870/210 - After reducing the fraction, the answer is -29/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/60-50/7 90/30-50/14 90/30-50/21 90/30-50/35 90/30-50/49