Subtract 90/50 from 50/45
1st number: 1 5/45, 2nd number: 1 40/50
50/45 - 90/50 is -31/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 50 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 45 × 10 = 450,
50/45 = 50 × 10/45 × 10 = 500/450 - Likewise, for the 2nd fraction, since 50 × 9 = 450,
90/50 = 90 × 9/50 × 9 = 810/450 - Subtract the two like fractions:
500/450 - 810/450 = 500 - 810/450 = -310/450 - After reducing the fraction, the answer is -31/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/90-90/50