Add 50/7 and 21/9, Solve 7 1/7 + 2 3/9 as a fraction

Add 50/7 and 21/9

1^st number: 7 1/7, 2^nd number: 2 3/9

50/7 + 21/9 is 199/21.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 9 is 63

Next, find the equivalent fraction of both fractional numbers with denominator 63
For the 1st fraction, since 7 × 9 = 63,
50/7 = 50 × 9/7 × 9 = 450/63
Likewise, for the 2nd fraction, since 9 × 7 = 63,
21/9 = 21 × 7/9 × 7 = 147/63
Add the two like fractions:
450/63 + 147/63 = 450 + 147/63 = 597/63
597/63 simplified gives 199/21
So, 50/7 + 21/9 = 199/21
In mixed form: 910/21

MathStep (Works offline)

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