Subtract 54/7 from 81/80
1st number: 1 1/80, 2nd number: 7 5/7
81/80 - 54/7 is -3753/560.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 7 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
81/80 = 81 × 7/80 × 7 = 567/560 - Likewise, for the 2nd fraction, since 7 × 80 = 560,
54/7 = 54 × 80/7 × 80 = 4320/560 - Subtract the two like fractions:
567/560 - 4320/560 = 567 - 4320/560 = -3753/560
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/80-54/14 81/80-54/21 81/80-54/35 81/80-54/49