Mr. Katz is a judge for a cooking competition. He samples 1/8 of each contestant's pie. Complete the model below by shading the portion of pie that
Mr. Katz ate from each pie and then find the total amount of pie that Mr. Katz
ate.

This is an illustration of multiplicative property of inequality.

According to the property if two values are equal, and the same number is multiplied to the both sides of the equation, the two values remain equal.

In given case

MN= 2AB

Both sides are multiplied by 3, and we get

3MN = 6AB

Since same number is being multiplied, the result will be equal.

So, correct answer is Multiplication property of equality