Subtract 90/12 from 80/30
1st number: 2 20/30, 2nd number: 7 6/12
80/30 - 90/12 is -29/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
80/30 = 80 × 2/30 × 2 = 160/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
90/12 = 90 × 5/12 × 5 = 450/60 - Subtract the two like fractions:
160/60 - 450/60 = 160 - 450/60 = -290/60 - After reducing the fraction, the answer is -29/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/60-90/12 80/30-90/24 80/90-90/12 80/30-90/36 80/30-90/60 80/30-90/84