Subtract 80/6 from 90/45
1st number: 2 0/45, 2nd number: 13 2/6
90/45 - 80/6 is -34/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 6 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
90/45 = 90 × 2/45 × 2 = 180/90 - Likewise, for the 2nd fraction, since 6 × 15 = 90,
80/6 = 80 × 15/6 × 15 = 1200/90 - Subtract the two like fractions:
180/90 - 1200/90 = 180 - 1200/90 = -1020/90 - After reducing the fraction, the answer is -34/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/45-80/12 90/45-80/18 90/45-80/30 90/45-80/42