Subtract 90/12 from 30/5
1st number: 6 0/5, 2nd number: 7 6/12
30/5 - 90/12 is -3/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 5 × 12 = 60,
30/5 = 30 × 12/5 × 12 = 360/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
90/12 = 90 × 5/12 × 5 = 450/60 - Subtract the two like fractions:
360/60 - 450/60 = 360 - 450/60 = -90/60 - After reducing the fraction, the answer is -3/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/5-90/12 30/10-90/12 30/5-90/24 90/5-90/12 30/15-90/12 30/5-90/36 30/25-90/12 30/5-90/60 30/35-90/12 30/5-90/84