Subtract 9/20 from 90/4
1st number: 22 2/4, 2nd number: 9/20
90/4 - 9/20 is 441/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
90/4 = 90 × 5/4 × 5 = 450/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
9/20 = 9 × 1/20 × 1 = 9/20 - Subtract the two like fractions:
450/20 - 9/20 = 450 - 9/20 = 441/20 - In mixed form: 221/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/4-18/20 90/8-9/20 90/4-9/40 90/4-27/20 90/12-9/20 90/4-9/60 90/4-45/20 90/20-9/20 90/4-63/20 90/28-9/20