Add 21/50 and 50/15, Solve 21/50 + 3 5/15 as a fraction

Add 21/50 and 50/15

1^st number: 21/50, 2^nd number: 3 5/15

21/50 + 50/15 is 563/150.

Find the least common denominator or LCM of the two denominators:
LCM of 50 and 15 is 150

Next, find the equivalent fraction of both fractional numbers with denominator 150
For the 1st fraction, since 50 × 3 = 150,
21/50 = 21 × 3/50 × 3 = 63/150
Likewise, for the 2nd fraction, since 15 × 10 = 150,
50/15 = 50 × 10/15 × 10 = 500/150
Add the two like fractions:
63/150 + 500/150 = 63 + 500/150 = 563/150
So, 21/50 + 50/15 = 563/150
In mixed form: 3113/150

MathStep (Works offline)

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