Subtract 50/7 from 90/70
1st number: 1 20/70, 2nd number: 7 1/7
90/70 - 50/7 is -41/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 7 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 70 × 1 = 70,
90/70 = 90 × 1/70 × 1 = 90/70 - Likewise, for the 2nd fraction, since 7 × 10 = 70,
50/7 = 50 × 10/7 × 10 = 500/70 - Subtract the two like fractions:
90/70 - 500/70 = 90 - 500/70 = -410/70 - After reducing the fraction, the answer is -41/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/70-50/14 90/70-50/21 90/70-50/35 90/70-50/49