Add 84/80 and 20/18
1st number: 1 4/80, 2nd number: 1 2/18
84/80 + 20/18 is 389/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 18 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
84/80 = 84 × 9/80 × 9 = 756/720 - Likewise, for the 2nd fraction, since 18 × 40 = 720,
20/18 = 20 × 40/18 × 40 = 800/720 - Add the two like fractions:
756/720 + 800/720 = 756 + 800/720 = 1556/720 - 1556/720 simplified gives 389/180
- So, 84/80 + 20/18 = 389/180
In mixed form: 229/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/80+40/18 84/80+20/36 84/80+60/18 84/80+20/54 84/80+20/90