Subtract 21/90 from 7/3
1st number: 2 1/3, 2nd number: 21/90
7/3 - 21/90 is 21/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 3 × 30 = 90,
7/3 = 7 × 30/3 × 30 = 210/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
21/90 = 21 × 1/90 × 1 = 21/90 - Subtract the two like fractions:
210/90 - 21/90 = 210 - 21/90 = 189/90 - After reducing the fraction, the answer is 21/10
- In mixed form: 21/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/3-21/90 7/3-42/90 7/6-21/90 21/3-21/90 7/3-63/90 7/9-21/90 35/3-21/90 7/15-21/90 49/3-21/90 7/21-21/90