Add 50/84 and 50/21, Solve 50/84 + 2 8/21 as a fraction

Add 50/84 and 50/21

1^st number: 50/84, 2^nd number: 2 8/21

50/84 + 50/21 is 125/42.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 21 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 84 × 1 = 84,
50/84 = 50 × 1/84 × 1 = 50/84
Likewise, for the 2nd fraction, since 21 × 4 = 84,
50/21 = 50 × 4/21 × 4 = 200/84
Add the two like fractions:
50/84 + 200/84 = 50 + 200/84 = 250/84
250/84 simplified gives 125/42
So, 50/84 + 50/21 = 125/42
In mixed form: 241/42

MathStep (Works offline)

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