You get this number when multiplying the numbers of 1703 and 3 
 
        
             
        
        
        
16 can be expressed as a difference of two prime numbers in two ways, which
is:23 - 7 = 16, 19 - 3 = 16 
Among the choices, 16 is expressed as (23 - 7), which is the difference of two prime numbers.
        
             
        
        
        
% means 'parts out of 100' so 
25%=25/100
is 12 is 25 parts out of 100 of a number
so 12=(25/100)x
   25/100 simplifies to 1/4
or if 12=(1/4)x
we multiply both sides by 4 and get
48=1x
        
             
        
        
        
<span>To calculate the change in CPI we need to do a % change formula. (New - Old) / (Old) = n. (121 - 110) / 110 = .10. This is equal to a 10% change in CPI.
To confirm the answer, do, (Old) * (1+n) = New CPI. 110*(1+.10) = 121. It equals so it is right!</span>