Subtract 10/20 from 90/8
1st number: 11 2/8, 2nd number: 10/20
90/8 - 10/20 is 43/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 20 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
90/8 = 90 × 5/8 × 5 = 450/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
10/20 = 10 × 2/20 × 2 = 20/40 - Subtract the two like fractions:
450/40 - 20/40 = 450 - 20/40 = 430/40 - After reducing the fraction, the answer is 43/4
- In mixed form: 103/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/16-10/20 90/8-10/40 90/8-30/20 90/24-10/20 90/8-10/60 90/8-50/20 90/40-10/20 90/8-70/20 90/56-10/20