Subtract 90/6 from 21/2
1st number: 10 1/2, 2nd number: 15 0/6
21/2 - 90/6 is -9/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 6 is 6
Next, find the equivalent fraction of both fractional numbers with denominator 6 - For the 1st fraction, since 2 × 3 = 6,
21/2 = 21 × 3/2 × 3 = 63/6 - Likewise, for the 2nd fraction, since 6 × 1 = 6,
90/6 = 90 × 1/6 × 1 = 90/6 - Subtract the two like fractions:
63/6 - 90/6 = 63 - 90/6 = -27/6 - After reducing the fraction, the answer is -9/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2-90/6 21/4-90/6 21/2-90/12 63/2-90/6 21/6-90/6 21/2-90/18 21/10-90/6 21/2-90/30 21/14-90/6 21/2-90/42