Subtract 90/18 from 7/2
1st number: 3 1/2, 2nd number: 5 0/18
7/2 - 90/18 is -3/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 18 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 2 × 9 = 18,
7/2 = 7 × 9/2 × 9 = 63/18 - Likewise, for the 2nd fraction, since 18 × 1 = 18,
90/18 = 90 × 1/18 × 1 = 90/18 - Subtract the two like fractions:
63/18 - 90/18 = 63 - 90/18 = -27/18 - After reducing the fraction, the answer is -3/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/2-90/18 7/4-90/18 7/2-90/36 21/2-90/18 7/6-90/18 7/2-90/54 35/2-90/18 7/10-90/18 49/2-90/18 7/14-90/18