Add 42/12 and 40/70
1st number: 3 6/12, 2nd number: 40/70
42/12 + 40/70 is 57/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 70 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 12 × 35 = 420,
42/12 = 42 × 35/12 × 35 = 1470/420 - Likewise, for the 2nd fraction, since 70 × 6 = 420,
40/70 = 40 × 6/70 × 6 = 240/420 - Add the two like fractions:
1470/420 + 240/420 = 1470 + 240/420 = 1710/420 - 1710/420 simplified gives 57/14
- So, 42/12 + 40/70 = 57/14
In mixed form: 41/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/12+40/70 42/12+80/70 42/24+40/70 42/36+40/70 42/60+40/70 42/84+40/70