Subtract 90/5 from 50/4
1st number: 12 2/4, 2nd number: 18 0/5
50/4 - 90/5 is -11/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 5 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
50/4 = 50 × 5/4 × 5 = 250/20 - Likewise, for the 2nd fraction, since 5 × 4 = 20,
90/5 = 90 × 4/5 × 4 = 360/20 - Subtract the two like fractions:
250/20 - 360/20 = 250 - 360/20 = -110/20 - After reducing the fraction, the answer is -11/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/8-90/5 50/4-90/10 50/12-90/5 50/4-90/15 50/20-90/5 50/4-90/25 50/28-90/5 50/4-90/35