Add 80/7 and 5/30, Solve 11 3/7 + 5/30 as a fraction

Add 80/7 and 5/30

1^st number: 11 3/7, 2^nd number: 5/30

80/7 + 5/30 is 487/42.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 30 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 7 × 30 = 210,
80/7 = 80 × 30/7 × 30 = 2400/210
Likewise, for the 2nd fraction, since 30 × 7 = 210,
5/30 = 5 × 7/30 × 7 = 35/210
Add the two like fractions:
2400/210 + 35/210 = 2400 + 35/210 = 2435/210
2435/210 simplified gives 487/42
So, 80/7 + 5/30 = 487/42
In mixed form: 1125/42

MathStep (Works offline)

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