Subtract 72/4 from 18/9
1st number: 2 0/9, 2nd number: 18 0/4
18/9 - 72/4 is -16/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 4 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 9 × 4 = 36,
18/9 = 18 × 4/9 × 4 = 72/36 - Likewise, for the 2nd fraction, since 4 × 9 = 36,
72/4 = 72 × 9/4 × 9 = 648/36 - Subtract the two like fractions:
72/36 - 648/36 = 72 - 648/36 = -576/36 - After reducing the fraction, the answer is -16/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/9-72/4 18/9-72/8 54/9-72/4 18/27-72/4 18/9-72/12 90/9-72/4 18/45-72/4 18/9-72/20 18/63-72/4 18/9-72/28