Add 90/14 and 72/12, Solve 6 6/14 + 6 0/12 as a fraction

Add 90/14 and 72/12

1^st number: 6 6/14, 2^nd number: 6 0/12

90/14 + 72/12 is 87/7.

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,
72/12 = 72 × 7/12 × 7 = 504/84
Add the two like fractions:
540/84 + 504/84 = 540 + 504/84 = 1044/84
1044/84 simplified gives 87/7
So, 90/14 + 72/12 = 87/7
In mixed form: 123/7

MathStep (Works offline)

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