14 boys and 21 girls will be equally divided into groups find the greatest number of groups that can be created is no one is left out

you could split the boys in half by 2 groups of 7 then use one of those seven group and add it to the 21 girls which is 28. Then divide 28 by 7 and you get 4. So there is 5 with 7 members in each. A more easy way of doing it is adding 14 and 21 together and you get 35 and 7x5 is 35. You can also do 7 groups of 5.