Subtract 90/45 from 5/12
1st number: 5/12, 2nd number: 2 0/45
5/12 - 90/45 is -19/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
5/12 = 5 × 15/12 × 15 = 75/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
90/45 = 90 × 4/45 × 4 = 360/180 - Subtract the two like fractions:
75/180 - 360/180 = 75 - 360/180 = -285/180 - After reducing the fraction, the answer is -19/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/12-90/45 5/24-90/45 15/12-90/45 5/36-90/45 25/12-90/45 5/60-90/45 35/12-90/45 5/84-90/45