Add 84/40 and 72/12
1st number: 2 4/40, 2nd number: 6 0/12
84/40 + 72/12 is 81/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 12 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
84/40 = 84 × 3/40 × 3 = 252/120 - Likewise, for the 2nd fraction, since 12 × 10 = 120,
72/12 = 72 × 10/12 × 10 = 720/120 - Add the two like fractions:
252/120 + 720/120 = 252 + 720/120 = 972/120 - 972/120 simplified gives 81/10
- So, 84/40 + 72/12 = 81/10
In mixed form: 81/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/80+72/12 84/40+72/24 84/40+72/36 84/40+72/60 84/40+72/84