Add 40/21 and 8/6, Solve 1 19/21 + 1 2/6 as a fraction

Add 40/21 and 8/6

1^st number: 1 19/21, 2^nd number: 1 2/6

40/21 + 8/6 is 68/21.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42

Next, find the equivalent fraction of both fractional numbers with denominator 42
For the 1st fraction, since 21 × 2 = 42,
40/21 = 40 × 2/21 × 2 = 80/42
Likewise, for the 2nd fraction, since 6 × 7 = 42,
8/6 = 8 × 7/6 × 7 = 56/42
Add the two like fractions:
80/42 + 56/42 = 80 + 56/42 = 136/42
136/42 simplified gives 68/21
So, 40/21 + 8/6 = 68/21
In mixed form: 35/21

MathStep (Works offline)

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