Subtract 20/8 from 90/4
1st number: 22 2/4, 2nd number: 2 4/8
90/4 - 20/8 is 20/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 8 is 8
Next, find the equivalent fraction of both fractional numbers with denominator 8 - For the 1st fraction, since 4 × 2 = 8,
90/4 = 90 × 2/4 × 2 = 180/8 - Likewise, for the 2nd fraction, since 8 × 1 = 8,
20/8 = 20 × 1/8 × 1 = 20/8 - Subtract the two like fractions:
180/8 - 20/8 = 180 - 20/8 = 160/8 - After reducing the fraction, the answer is 20/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/4-40/8 90/8-20/8 90/4-20/16 90/4-60/8 90/12-20/8 90/4-20/24 90/20-20/8 90/4-20/40 90/28-20/8 90/4-20/56