The first box is 3 more than the quotient of 6 and a number, the second is 6 less than the product of 3 and a number, the third box is the product of 6 and the sum of a number and 3.
Divide 12 by 3 and you'll get 4. That means 1/4 or a quarter of the 12 is 3. (Convert the fraction to its percentage form) 1/4 or 1 divided by 4 equals 0.25 Multiply 0.25 by 100 and you'll get 25%