Add 60/18 and 8/21, Solve 3 6/18 + 8/21 as a fraction

Add 60/18 and 8/21

1^st number: 3 6/18, 2^nd number: 8/21

60/18 + 8/21 is 26/7.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 18 × 7 = 126,
60/18 = 60 × 7/18 × 7 = 420/126
Likewise, for the 2nd fraction, since 21 × 6 = 126,
8/21 = 8 × 6/21 × 6 = 48/126
Add the two like fractions:
420/126 + 48/126 = 420 + 48/126 = 468/126
468/126 simplified gives 26/7
So, 60/18 + 8/21 = 26/7
In mixed form: 35/7

MathStep (Works offline)

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