Subtract 18/9 from 5/4
1st number: 1 1/4, 2nd number: 2 0/9
5/4 - 18/9 is -3/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 9 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 4 × 9 = 36,
5/4 = 5 × 9/4 × 9 = 45/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
18/9 = 18 × 4/9 × 4 = 72/36 - Subtract the two like fractions:
45/36 - 72/36 = 45 - 72/36 = -27/36 - After reducing the fraction, the answer is -3/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/4-18/9 5/4-36/9 5/8-18/9 15/4-18/9 5/4-54/9 5/12-18/9 5/4-18/27 25/4-18/9 5/4-90/9 5/20-18/9 5/4-18/45 35/4-18/9 5/28-18/9 5/4-18/63