Subtract 90/36 from 12/5
1st number: 2 2/5, 2nd number: 2 18/36
12/5 - 90/36 is -1/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 5 × 36 = 180,
12/5 = 12 × 36/5 × 36 = 432/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
90/36 = 90 × 5/36 × 5 = 450/180 - Subtract the two like fractions:
432/180 - 450/180 = 432 - 450/180 = -18/180 - After reducing the fraction, the answer is -1/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/5-90/36 12/10-90/36 12/5-90/72 36/5-90/36 12/15-90/36 60/5-90/36 12/25-90/36 84/5-90/36 12/35-90/36