Add 42/2 and 36/7, Solve 21 0/2 + 5 1/7 as a fraction

Add 42/2 and 36/7

1^st number: 21 0/2, 2^nd number: 5 1/7

42/2 + 36/7 is 183/7.

Find the least common denominator or LCM of the two denominators:
LCM of 2 and 7 is 14

Next, find the equivalent fraction of both fractional numbers with denominator 14
For the 1st fraction, since 2 × 7 = 14,
42/2 = 42 × 7/2 × 7 = 294/14
Likewise, for the 2nd fraction, since 7 × 2 = 14,
36/7 = 36 × 2/7 × 2 = 72/14
Add the two like fractions:
294/14 + 72/14 = 294 + 72/14 = 366/14
366/14 simplified gives 183/7
So, 42/2 + 36/7 = 183/7
In mixed form: 261/7

MathStep (Works offline)

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