Subtract 90/50 from 50/40
1st number: 1 10/40, 2nd number: 1 40/50
50/40 - 90/50 is -11/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 50 is 200
Next, find the equivalent fraction of both fractional numbers with denominator 200 - For the 1st fraction, since 40 × 5 = 200,
50/40 = 50 × 5/40 × 5 = 250/200 - Likewise, for the 2nd fraction, since 50 × 4 = 200,
90/50 = 90 × 4/50 × 4 = 360/200 - Subtract the two like fractions:
250/200 - 360/200 = 250 - 360/200 = -110/200 - After reducing the fraction, the answer is -11/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/80-90/50