Add 30/5 and 21/45, Solve 6 0/5 + 21/45 as a fraction

Add 30/5 and 21/45

1^st number: 6 0/5, 2^nd number: 21/45

30/5 + 21/45 is 97/15.

Find the least common denominator or LCM of the two denominators:
LCM of 5 and 45 is 45

Next, find the equivalent fraction of both fractional numbers with denominator 45
For the 1st fraction, since 5 × 9 = 45,
30/5 = 30 × 9/5 × 9 = 270/45
Likewise, for the 2nd fraction, since 45 × 1 = 45,
21/45 = 21 × 1/45 × 1 = 21/45
Add the two like fractions:
270/45 + 21/45 = 270 + 21/45 = 291/45
291/45 simplified gives 97/15
So, 30/5 + 21/45 = 97/15
In mixed form: 67/15

MathStep (Works offline)

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