Subtract 90/45 from 18/8
1st number: 2 2/8, 2nd number: 2 0/45
18/8 - 90/45 is 1/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 45 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 8 × 45 = 360,
18/8 = 18 × 45/8 × 45 = 810/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
90/45 = 90 × 8/45 × 8 = 720/360 - Subtract the two like fractions:
810/360 - 720/360 = 810 - 720/360 = 90/360 - After reducing the fraction, the answer is 1/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/8-90/45 18/16-90/45 54/8-90/45 18/24-90/45 90/8-90/45 18/40-90/45 18/56-90/45