Subtract 18/81 from 84/80
1st number: 1 4/80, 2nd number: 18/81
84/80 - 18/81 is 149/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 81 is 6480
Next, find the equivalent fraction of both fractional numbers with denominator 6480 - For the 1st fraction, since 80 × 81 = 6480,
84/80 = 84 × 81/80 × 81 = 6804/6480 - Likewise, for the 2nd fraction, since 81 × 80 = 6480,
18/81 = 18 × 80/81 × 80 = 1440/6480 - Subtract the two like fractions:
6804/6480 - 1440/6480 = 6804 - 1440/6480 = 5364/6480 - After reducing the fraction, the answer is 149/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/80-36/81 84/80-54/81 84/80-90/81