Subtract 8/21 from 45/2
1st number: 22 1/2, 2nd number: 8/21
45/2 - 8/21 is 929/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
45/2 = 45 × 21/2 × 21 = 945/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
8/21 = 8 × 2/21 × 2 = 16/42 - Subtract the two like fractions:
945/42 - 16/42 = 945 - 16/42 = 929/42 - In mixed form: 225/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/2-8/21 45/2-16/21 45/4-8/21 45/2-8/42 45/2-24/21 45/6-8/21 45/2-8/63 45/2-40/21 45/10-8/21 45/2-56/21 45/14-8/21