Answer:
Step-by-step explanation:
15 minutes of an hour is 15/60. So 15/60 can be simplified to 1/4.
 
        
             
        
        
        
Make the fractions improper:
33/4 + 14/5
Find common denominator:
165/20 + 56/20
Add:
221/20
Answer:
11 1/20
        
                    
             
        
        
        
Hey!
Hope this helps...
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54 * (2/3) = 36 students were on the bus.
54 - 36 = 18 chaperones were on the bus.