Add 9/12 and 84/40
1st number: 9/12, 2nd number: 2 4/40
9/12 + 84/40 is 57/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 12 × 10 = 120,
9/12 = 9 × 10/12 × 10 = 90/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
84/40 = 84 × 3/40 × 3 = 252/120 - Add the two like fractions:
90/120 + 252/120 = 90 + 252/120 = 342/120 - 342/120 simplified gives 57/20
- So, 9/12 + 84/40 = 57/20
In mixed form: 217/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/12+84/40 9/24+84/40 9/12+84/80 27/12+84/40 9/36+84/40 45/12+84/40 9/60+84/40 63/12+84/40 9/84+84/40