Answer: perimeter of the rectangle is 28 cm
54 cm and 30 cm
The new perimeter of the new rectangle is 168cm
The new perimeter is 6 times greater
Step-by-step explanation:
I just answered then and got it right 
 
        
             
        
        
        
 Quotient is:

Remainder: 0
Answer and workings in the attachment below.
 
        
        
        
5/8 as a percentage is 62.5 
hope i helped :D
        
                    
             
        
        
        
1/7 (x - 3) = 5/7
1/7x - 3/7 = 5/7
1/7x - 3/7 + 3/7 = 5/7 + 3/7
1/7x = 8/7
1/7x(7) = 8/7(7)
X = 56/7
X = 8
        
             
        
        
        
See attached photo for answers. let me know if you are doing rounding to a specific decimal.