Subtract 25/12 from 20/90
1st number: 20/90, 2nd number: 2 1/12
20/90 - 25/12 is -67/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 12 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
20/90 = 20 × 2/90 × 2 = 40/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
25/12 = 25 × 15/12 × 15 = 375/180 - Subtract the two like fractions:
40/180 - 375/180 = 40 - 375/180 = -335/180 - After reducing the fraction, the answer is -67/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/90-25/12 20/90-50/12 20/90-25/24 60/90-25/12 20/90-75/12 20/90-25/36 20/90-25/60 20/90-25/84