Subtract 4/50 from 18/45
18/45 - 4/50 is 8/25.
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,
18/45 = 18 × 10/45 × 10 = 180/450 - Likewise, for the 2nd fraction, since 50 × 9 = 450,
4/50 = 4 × 9/50 × 9 = 36/450 - Subtract the two like fractions:
180/450 - 36/450 = 180 - 36/450 = 144/450 - After reducing the fraction, the answer is 8/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/45-4/50 18/45-8/50 18/90-4/50 54/45-4/50 18/45-12/50 90/45-4/50 18/45-20/50 18/45-28/50