Answer:
The ratio of African Americans to Hispanics Americans present is 16 : 5 
Step-by-step explanation: 
Given the people attending the soccer game were: 
2800 among them are Caucasians 
4800 are African Americans 
1500 are Hispanics 
And, 1400 of those were from other ethnic backgrounds 
We have to find the Ratio of African Americans to Hispanics Americans 
Therefore,
African Americans : Hispanics Americans = 4800 : 1500 

Hence, the ratio of African Americans to Hispanics Americans present in the ratio were 16 : 5