Subtract 72/27 from 7/4
1st number: 1 3/4, 2nd number: 2 18/27
7/4 - 72/27 is -11/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 27 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 4 × 27 = 108,
7/4 = 7 × 27/4 × 27 = 189/108 - Likewise, for the 2nd fraction, since 27 × 4 = 108,
72/27 = 72 × 4/27 × 4 = 288/108 - Subtract the two like fractions:
189/108 - 288/108 = 189 - 288/108 = -99/108 - After reducing the fraction, the answer is -11/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/4-72/27 7/8-72/27 7/4-72/54 21/4-72/27 7/12-72/27 7/4-72/81 35/4-72/27 7/20-72/27 49/4-72/27 7/28-72/27