Subtract 90/8 from 30/2
1st number: 15 0/2, 2nd number: 11 2/8
30/2 - 90/8 is 15/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 8 is 8
Next, find the equivalent fraction of both fractional numbers with denominator 8 - For the 1st fraction, since 2 × 4 = 8,
30/2 = 30 × 4/2 × 4 = 120/8 - Likewise, for the 2nd fraction, since 8 × 1 = 8,
90/8 = 90 × 1/8 × 1 = 90/8 - Subtract the two like fractions:
120/8 - 90/8 = 120 - 90/8 = 30/8 - After reducing the fraction, the answer is 15/4
- In mixed form: 33/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/2-90/8 30/4-90/8 30/2-90/16 90/2-90/8 30/6-90/8 30/2-90/24 30/10-90/8 30/2-90/40 30/14-90/8 30/2-90/56