Subtract 3/12 from 5/90
5/90 - 3/12 is -7/36.
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,
5/90 = 5 × 2/90 × 2 = 10/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
3/12 = 3 × 15/12 × 15 = 45/180 - Subtract the two like fractions:
10/180 - 45/180 = 10 - 45/180 = -35/180 - After reducing the fraction, the answer is -7/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/90-3/12 5/90-6/12 5/90-3/24 15/90-3/12 5/90-9/12 5/90-3/36 25/90-3/12 5/90-15/12 5/90-3/60 35/90-3/12 5/90-21/12 5/90-3/84