Answer:
You will gain $27
Step-by-step explanation:
Just multiply $63 times 0.42857142857
 
        
             
        
        
        
Answer:
1=90%
Step-by-step explanation:
20-2=18, 18/20=90%
 
        
                    
             
        
        
        
I think it may be true, please correct me if i am wrong
        
                    
             
        
        
        
Http://www.pierce.ctc.edu/staff/dlippman/mathinsociety/Finance1.0.pdf I think this will help