Add 80/35 and 2/21, Solve 2 10/35 + 2/21 as a fraction

Add 80/35 and 2/21

1^st number: 2 10/35, 2^nd number: 2/21

80/35 + 2/21 is 50/21.

Find the least common denominator or LCM of the two denominators:
LCM of 35 and 21 is 105

Next, find the equivalent fraction of both fractional numbers with denominator 105
For the 1st fraction, since 35 × 3 = 105,
80/35 = 80 × 3/35 × 3 = 240/105
Likewise, for the 2nd fraction, since 21 × 5 = 105,
2/21 = 2 × 5/21 × 5 = 10/105
Add the two like fractions:
240/105 + 10/105 = 240 + 10/105 = 250/105
250/105 simplified gives 50/21
So, 80/35 + 2/21 = 50/21
In mixed form: 28/21

MathStep (Works offline)

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