Consider the question. Carter is twice as tall as his 24” tall dog. Betty is 12” shorter than Carter. How tall is Betty in feet?
 If the answer is '3'; explain the reasoning:
Carter is twice as tall as 24” dog so he is 2 * 24 = 48”. Betty is 12” shorter than Carter so Betty is 48 - 12 = 36” tall. 12" is the same as 1 foot so Betty is 36 / 12 = 3 feet tall.