Subtract 9/80 from 90/50
1st number: 1 40/50, 2nd number: 9/80
90/50 - 9/80 is 27/16.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 80 is 400
Next, find the equivalent fraction of both fractional numbers with denominator 400 - For the 1st fraction, since 50 × 8 = 400,
90/50 = 90 × 8/50 × 8 = 720/400 - Likewise, for the 2nd fraction, since 80 × 5 = 400,
9/80 = 9 × 5/80 × 5 = 45/400 - Subtract the two like fractions:
720/400 - 45/400 = 720 - 45/400 = 675/400 - After reducing the fraction, the answer is 27/16
- In mixed form: 111/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/50-18/80 90/50-27/80 90/50-45/80 90/50-63/80