Subtract 45/20 from 9/2
1st number: 4 1/2, 2nd number: 2 5/20
9/2 - 45/20 is 9/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 2 × 10 = 20,
9/2 = 9 × 10/2 × 10 = 90/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
45/20 = 45 × 1/20 × 1 = 45/20 - Subtract the two like fractions:
90/20 - 45/20 = 90 - 45/20 = 45/20 - After reducing the fraction, the answer is 9/4
- In mixed form: 21/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/2-45/20 9/2-90/20 9/4-45/20 9/2-45/40 27/2-45/20 9/6-45/20 9/2-45/60 45/2-45/20 9/10-45/20 63/2-45/20 9/14-45/20