Subtract 5/12 from 90/20
1st number: 4 10/20, 2nd number: 5/12
90/20 - 5/12 is 49/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
90/20 = 90 × 3/20 × 3 = 270/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
5/12 = 5 × 5/12 × 5 = 25/60 - Subtract the two like fractions:
270/60 - 25/60 = 270 - 25/60 = 245/60 - After reducing the fraction, the answer is 49/12
- In mixed form: 41/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20-10/12 90/40-5/12 90/20-5/24 90/20-15/12 90/60-5/12 90/20-5/36 90/20-25/12 90/20-5/60 90/20-35/12 90/20-5/84