Jupiter blocks about    

                          2
         (  71.5 x 10^3 ) 
         ( ------------ )        =   0.0106    =   1.06 percent  of Sun's light
         (  696  x 10^3 )



   Earth   blocks about    

                           2
         (   5.97 x 10^3 ) 
         ( ------------- )        =   0.000084  =   0.0084 percent of Sun's light
         (  696   x 10^3 )