Add 84/40 and 42/12
1st number: 2 4/40, 2nd number: 3 6/12
84/40 + 42/12 is 28/5.
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,
42/12 = 42 × 10/12 × 10 = 420/120 - Add the two like fractions:
252/120 + 420/120 = 252 + 420/120 = 672/120 - 672/120 simplified gives 28/5
- So, 84/40 + 42/12 = 28/5
In mixed form: 53/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/40+84/12 84/80+42/12 84/40+42/24 84/40+42/36 84/40+42/60 84/40+42/84