Add 15/50 and 27/21, Solve 15/50 + 1 6/21 as a fraction

Add 15/50 and 27/21

1^st number: 15/50, 2^nd number: 1 6/21

15/50 + 27/21 is 111/70.

Find the least common denominator or LCM of the two denominators:
LCM of 50 and 21 is 1050

Next, find the equivalent fraction of both fractional numbers with denominator 1050
For the 1st fraction, since 50 × 21 = 1050,
15/50 = 15 × 21/50 × 21 = 315/1050
Likewise, for the 2nd fraction, since 21 × 50 = 1050,
27/21 = 27 × 50/21 × 50 = 1350/1050
Add the two like fractions:
315/1050 + 1350/1050 = 315 + 1350/1050 = 1665/1050
1665/1050 simplified gives 111/70
So, 15/50 + 27/21 = 111/70
In mixed form: 141/70

MathStep (Works offline)

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