Subtract 15/90 from 80/12
1st number: 6 8/12, 2nd number: 15/90
80/12 - 15/90 is 13/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
80/12 = 80 × 15/12 × 15 = 1200/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
15/90 = 15 × 2/90 × 2 = 30/180 - Subtract the two like fractions:
1200/180 - 30/180 = 1200 - 30/180 = 1170/180 - After reducing the fraction, the answer is 13/2
- In mixed form: 61/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/12-30/90 80/24-15/90 80/12-45/90 80/36-15/90 80/12-75/90 80/60-15/90 80/84-15/90