A zoo-keeper has 9 gorillas and 12 monkeys. He wants to keep the ratio of gorillas to monkeys the same. If the zoo-keeper buys 3
 more gorillas, how many more monkeys will he need to buy?
       
      
                
     
    
    
    
    
    2 answers:
            
              
              
                
                
Answer:
12:15
Step-by-step explanation:
9:12
9+3:12+3
12:15
 
                                
             
                    
              
              
                
                
Answer: He would have to buy no more monkeys because if he buys 3 more gorillas the ratio would be equal
 
                                
             
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