Add 40/2 and 4/21, Solve 20 0/2 + 4/21 as a fraction

Add 40/2 and 4/21

1^st number: 20 0/2, 2^nd number: 4/21

40/2 + 4/21 is 424/21.

Find the least common denominator or LCM of the two denominators:
LCM of 2 and 21 is 42

Next, find the equivalent fraction of both fractional numbers with denominator 42
For the 1st fraction, since 2 × 21 = 42,
40/2 = 40 × 21/2 × 21 = 840/42
Likewise, for the 2nd fraction, since 21 × 2 = 42,
4/21 = 4 × 2/21 × 2 = 8/42
Add the two like fractions:
840/42 + 8/42 = 840 + 8/42 = 848/42
848/42 simplified gives 424/21
So, 40/2 + 4/21 = 424/21
In mixed form: 204/21

MathStep (Works offline)

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