Subtract 54/45 from 18/50
1st number: 18/50, 2nd number: 1 9/45
18/50 - 54/45 is -21/25.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 45 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 50 × 9 = 450,
18/50 = 18 × 9/50 × 9 = 162/450 - Likewise, for the 2nd fraction, since 45 × 10 = 450,
54/45 = 54 × 10/45 × 10 = 540/450 - Subtract the two like fractions:
162/450 - 540/450 = 162 - 540/450 = -378/450 - After reducing the fraction, the answer is -21/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/50-54/45 18/50-54/90 54/50-54/45 90/50-54/45