Subtract 90/40 from 80/7
1st number: 11 3/7, 2nd number: 2 10/40
80/7 - 90/40 is 257/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 7 × 40 = 280,
80/7 = 80 × 40/7 × 40 = 3200/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
90/40 = 90 × 7/40 × 7 = 630/280 - Subtract the two like fractions:
3200/280 - 630/280 = 3200 - 630/280 = 2570/280 - After reducing the fraction, the answer is 257/28
- In mixed form: 95/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/14-90/40 80/7-90/80 80/21-90/40 80/35-90/40 80/49-90/40