Subtract 90/80 from 15/3
1st number: 5 0/3, 2nd number: 1 10/80
15/3 - 90/80 is 31/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 3 × 80 = 240,
15/3 = 15 × 80/3 × 80 = 1200/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
90/80 = 90 × 3/80 × 3 = 270/240 - Subtract the two like fractions:
1200/240 - 270/240 = 1200 - 270/240 = 930/240 - After reducing the fraction, the answer is 31/8
- In mixed form: 37/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/3-90/80 15/6-90/80 45/3-90/80 15/9-90/80 75/3-90/80 15/21-90/80