Subtract 12/18 from 90/50
1st number: 1 40/50, 2nd number: 12/18
90/50 - 12/18 is 17/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 18 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 50 × 9 = 450,
90/50 = 90 × 9/50 × 9 = 810/450 - Likewise, for the 2nd fraction, since 18 × 25 = 450,
12/18 = 12 × 25/18 × 25 = 300/450 - Subtract the two like fractions:
810/450 - 300/450 = 810 - 300/450 = 510/450 - After reducing the fraction, the answer is 17/15
- In mixed form: 12/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/50-24/18 90/50-12/36 90/50-36/18 90/50-12/54 90/50-60/18 90/50-12/90 90/50-84/18