Subtract 45/20 from 90/8
1st number: 11 2/8, 2nd number: 2 5/20
90/8 - 45/20 is 9/1.
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,
45/20 = 45 × 2/20 × 2 = 90/40 - Subtract the two like fractions:
450/40 - 90/40 = 450 - 90/40 = 360/40 - After reducing the fraction, the answer is 9/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/8-90/20 90/16-45/20 90/8-45/40 90/24-45/20 90/8-45/60 90/40-45/20 90/56-45/20