Respuesta :

Hey there!

Step 1: Calculate percentage

Since 30% of the marbles are green

=> 80 × 30/100

=> 8 × 30/10

=> 240/10

=> 24

So, 24 of the marbles are green

Step 2: Substract 24 from 80

=> 80 - 24

=> 56

Therefore, 56 marbles are not green