Joey organised a large wedding
Guests had to choose their meal out of beef chicken and vegetarian
1/3-choose beef
5/12- choose chicken
And 69 choose vegetarian
How many guests are at the wedding

Ok so we need to find out what fraction of 12 the veggies are. To do this we need to add the beef and chicken so
1/3 x 4 = 4/12 so we have a common denominator to add both fractions.
4/12 + 5/12 = 9/12
This means that 3/12 chose veggie
3/12 is equivalent to 1/4 (divide by three)
so if we multiple 69 by 4 we get the total number of guests.
69 x 4 = 276
I hope this helps