For every 13 birds born at the zoo there are two animals born. There were 44 if you were animals born last month then birds so how many animals were born?
the ratio birds : animals = 13 : 2 so for every 1 animal, 6.5 birds were born
last month: animals = birds - 44 birds - animals = 44 use trial and improvement to find: if there were 52 birds, there must be 8 animals CHECK: 52 - 8 = 44
