Subtract 18/8 from 90/4
1st number: 22 2/4, 2nd number: 2 2/8
90/4 - 18/8 is 81/4.
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,
18/8 = 18 × 1/8 × 1 = 18/8 - Subtract the two like fractions:
180/8 - 18/8 = 180 - 18/8 = 162/8 - After reducing the fraction, the answer is 81/4
- In mixed form: 201/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/4-36/8 90/8-18/8 90/4-18/16 90/4-54/8 90/12-18/8 90/4-18/24 90/4-90/8 90/20-18/8 90/4-18/40 90/28-18/8 90/4-18/56