Subtract 80/7 from 90/36
1st number: 2 18/36, 2nd number: 11 3/7
90/36 - 80/7 is -125/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 7 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
90/36 = 90 × 7/36 × 7 = 630/252 - Likewise, for the 2nd fraction, since 7 × 36 = 252,
80/7 = 80 × 36/7 × 36 = 2880/252 - Subtract the two like fractions:
630/252 - 2880/252 = 630 - 2880/252 = -2250/252 - After reducing the fraction, the answer is -125/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/72-80/7 90/36-80/14 90/36-80/21 90/36-80/35 90/36-80/49