Subtract 72/20 from 7/54
1st number: 7/54, 2nd number: 3 12/20
7/54 - 72/20 is -937/270.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 20 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 54 × 10 = 540,
7/54 = 7 × 10/54 × 10 = 70/540 - Likewise, for the 2nd fraction, since 20 × 27 = 540,
72/20 = 72 × 27/20 × 27 = 1944/540 - Subtract the two like fractions:
70/540 - 1944/540 = 70 - 1944/540 = -1874/540 - After reducing the fraction, the answer is -937/270
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/54-72/20 7/54-72/40 21/54-72/20 7/54-72/60 35/54-72/20 49/54-72/20