Add 80/14 and 12/63, Solve 5 10/14 + 12/63 as a fraction

Add 80/14 and 12/63

1^st number: 5 10/14, 2^nd number: 12/63

80/14 + 12/63 is 124/21.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 63 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 14 × 9 = 126,
80/14 = 80 × 9/14 × 9 = 720/126
Likewise, for the 2nd fraction, since 63 × 2 = 126,
12/63 = 12 × 2/63 × 2 = 24/126
Add the two like fractions:
720/126 + 24/126 = 720 + 24/126 = 744/126
744/126 simplified gives 124/21
So, 80/14 + 12/63 = 124/21
In mixed form: 519/21

MathStep (Works offline)

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