Subtract 27/21 from 54/80
1st number: 54/80, 2nd number: 1 6/21
54/80 - 27/21 is -171/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 21 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 80 × 21 = 1680,
54/80 = 54 × 21/80 × 21 = 1134/1680 - Likewise, for the 2nd fraction, since 21 × 80 = 1680,
27/21 = 27 × 80/21 × 80 = 2160/1680 - Subtract the two like fractions:
1134/1680 - 2160/1680 = 1134 - 2160/1680 = -1026/1680 - After reducing the fraction, the answer is -171/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/80-54/21 54/80-27/42 54/80-81/21 54/80-27/63