Subtract 2/81 from 84/80
1st number: 1 4/80, 2nd number: 2/81
84/80 - 2/81 is 1661/1620.
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,
2/81 = 2 × 80/81 × 80 = 160/6480 - Subtract the two like fractions:
6804/6480 - 160/6480 = 6804 - 160/6480 = 6644/6480 - After reducing the fraction, the answer is 1661/1620
- In mixed form: 141/1620
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/80-4/81 84/80-6/81 84/80-10/81 84/80-14/81