Add 12/40 and 6/7
12/40 + 6/7 is 81/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 7 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
12/40 = 12 × 7/40 × 7 = 84/280 - Likewise, for the 2nd fraction, since 7 × 40 = 280,
6/7 = 6 × 40/7 × 40 = 240/280 - Add the two like fractions:
84/280 + 240/280 = 84 + 240/280 = 324/280 - 324/280 simplified gives 81/70
- So, 12/40 + 6/7 = 81/70
In mixed form: 111/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/40+6/7 12/40+12/7 12/80+6/7 12/40+6/14 36/40+6/7 12/40+18/7 12/40+6/21 60/40+6/7 12/40+30/7 12/40+6/35 84/40+6/7 12/40+42/7 12/40+6/49