Subtract 72/7 from 27/20
1st number: 1 7/20, 2nd number: 10 2/7
27/20 - 72/7 is -1251/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
27/20 = 27 × 7/20 × 7 = 189/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
72/7 = 72 × 20/7 × 20 = 1440/140 - Subtract the two like fractions:
189/140 - 1440/140 = 189 - 1440/140 = -1251/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/20-72/7 27/40-72/7 27/20-72/14 81/20-72/7 27/60-72/7 27/20-72/21 27/20-72/35 27/20-72/49