Add 90/14 and 4/12, Solve 6 6/14 + 4/12 as a fraction

Add 90/14 and 4/12

1^st number: 6 6/14, 2^nd number: 4/12

90/14 + 4/12 is 142/21.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 12 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 14 × 6 = 84,
90/14 = 90 × 6/14 × 6 = 540/84
Likewise, for the 2nd fraction, since 12 × 7 = 84,
4/12 = 4 × 7/12 × 7 = 28/84
Add the two like fractions:
540/84 + 28/84 = 540 + 28/84 = 568/84
568/84 simplified gives 142/21
So, 90/14 + 4/12 = 142/21
In mixed form: 616/21

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad