Add 21/49 and 63/9, Solve 21/49 + 7 0/9 as a fraction

Add 21/49 and 63/9

1^st number: 21/49, 2^nd number: 7 0/9

21/49 + 63/9 is 52/7.

Find the least common denominator or LCM of the two denominators:
LCM of 49 and 9 is 441

Next, find the equivalent fraction of both fractional numbers with denominator 441
For the 1st fraction, since 49 × 9 = 441,
21/49 = 21 × 9/49 × 9 = 189/441
Likewise, for the 2nd fraction, since 9 × 49 = 441,
63/9 = 63 × 49/9 × 49 = 3087/441
Add the two like fractions:
189/441 + 3087/441 = 189 + 3087/441 = 3276/441
3276/441 simplified gives 52/7
So, 21/49 + 63/9 = 52/7
In mixed form: 73/7

MathStep (Works offline)

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