Add 21/70 and 50/36, Solve 21/70 + 1 14/36 as a fraction

Add 21/70 and 50/36

1^st number: 21/70, 2^nd number: 1 14/36

21/70 + 50/36 is 76/45.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 36 is 1260

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 70 × 18 = 1260,
21/70 = 21 × 18/70 × 18 = 378/1260
Likewise, for the 2nd fraction, since 36 × 35 = 1260,
50/36 = 50 × 35/36 × 35 = 1750/1260
Add the two like fractions:
378/1260 + 1750/1260 = 378 + 1750/1260 = 2128/1260
2128/1260 simplified gives 76/45
So, 21/70 + 50/36 = 76/45
In mixed form: 131/45

MathStep (Works offline)

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