Subtract 1/20 from 90/4
1st number: 22 2/4, 2nd number: 1/20
90/4 - 1/20 is 449/20.
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,
1/20 = 1 × 1/20 × 1 = 1/20 - Subtract the two like fractions:
450/20 - 1/20 = 450 - 1/20 = 449/20 - In mixed form: 229/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/4-2/20 90/8-1/20 90/4-1/40 90/4-3/20 90/12-1/20 90/4-1/60 90/4-5/20 90/20-1/20 90/4-7/20 90/28-1/20