Add 63/27 and 50/21, Solve 2 9/27 + 2 8/21 as a fraction

Add 63/27 and 50/21

1^st number: 2 9/27, 2^nd number: 2 8/21

63/27 + 50/21 is 33/7.

Find the least common denominator or LCM of the two denominators:
LCM of 27 and 21 is 189

Next, find the equivalent fraction of both fractional numbers with denominator 189
For the 1st fraction, since 27 × 7 = 189,
63/27 = 63 × 7/27 × 7 = 441/189
Likewise, for the 2nd fraction, since 21 × 9 = 189,
50/21 = 50 × 9/21 × 9 = 450/189
Add the two like fractions:
441/189 + 450/189 = 441 + 450/189 = 891/189
891/189 simplified gives 33/7
So, 63/27 + 50/21 = 33/7
In mixed form: 45/7

MathStep (Works offline)

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