Add 84/40 and 12/80
1st number: 2 4/40, 2nd number: 12/80
84/40 + 12/80 is 9/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 40 × 2 = 80,
84/40 = 84 × 2/40 × 2 = 168/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
12/80 = 12 × 1/80 × 1 = 12/80 - Add the two like fractions:
168/80 + 12/80 = 168 + 12/80 = 180/80 - 180/80 simplified gives 9/4
- So, 84/40 + 12/80 = 9/4
In mixed form: 21/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/40+24/80 84/80+12/80 84/40+36/80 84/40+60/80 84/40+84/80