Add 40/42 and 12/36
40/42 + 12/36 is 9/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 42 × 6 = 252,
40/42 = 40 × 6/42 × 6 = 240/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
12/36 = 12 × 7/36 × 7 = 84/252 - Add the two like fractions:
240/252 + 84/252 = 240 + 84/252 = 324/252 - 324/252 simplified gives 9/7
- So, 40/42 + 12/36 = 9/7
In mixed form: 12/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/42+12/36 40/42+24/36 40/84+12/36 40/42+12/72 40/42+60/36 40/42+84/36