Add 84/36 and 50/70, Solve 2 12/36 + 50/70 as a fraction

Add 84/36 and 50/70

1^st number: 2 12/36, 2^nd number: 50/70

84/36 + 50/70 is 64/21.

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

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 36 × 35 = 1260,
84/36 = 84 × 35/36 × 35 = 2940/1260
Likewise, for the 2nd fraction, since 70 × 18 = 1260,
50/70 = 50 × 18/70 × 18 = 900/1260
Add the two like fractions:
2940/1260 + 900/1260 = 2940 + 900/1260 = 3840/1260
3840/1260 simplified gives 64/21
So, 84/36 + 50/70 = 64/21
In mixed form: 31/21

MathStep (Works offline)

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