Subtract 90/80 from 90/2
1st number: 45 0/2, 2nd number: 1 10/80
90/2 - 90/80 is 351/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 2 × 40 = 80,
90/2 = 90 × 40/2 × 40 = 3600/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
90/80 = 90 × 1/80 × 1 = 90/80 - Subtract the two like fractions:
3600/80 - 90/80 = 3600 - 90/80 = 3510/80 - After reducing the fraction, the answer is 351/8
- In mixed form: 437/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/4-90/80 90/6-90/80 90/10-90/80 90/14-90/80