Subtract 14/90 from 21/2
1st number: 10 1/2, 2nd number: 14/90
21/2 - 14/90 is 931/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 2 × 45 = 90,
21/2 = 21 × 45/2 × 45 = 945/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
14/90 = 14 × 1/90 × 1 = 14/90 - Subtract the two like fractions:
945/90 - 14/90 = 945 - 14/90 = 931/90 - In mixed form: 1031/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2-14/90 21/2-28/90 21/4-14/90 63/2-14/90 21/2-42/90 21/6-14/90 21/2-70/90 21/10-14/90 21/2-98/90 21/14-14/90