Subtract 35/20 from 72/18
1st number: 4 0/18, 2nd number: 1 15/20
72/18 - 35/20 is 9/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 18 × 10 = 180,
72/18 = 72 × 10/18 × 10 = 720/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
35/20 = 35 × 9/20 × 9 = 315/180 - Subtract the two like fractions:
720/180 - 315/180 = 720 - 315/180 = 405/180 - After reducing the fraction, the answer is 9/4
- In mixed form: 21/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/18-70/20 72/36-35/20 72/18-35/40 72/54-35/20 72/18-35/60 72/90-35/20