There are 65 students who walk to West Middle School each day. This is 12.5% 0f the total student at the school. How many students attend West Middle School

"This" refers to the 65 students who walk. "Is" can be written with an equal sign. 12.5% means 12.5/100 which is 0.125. "Of" in word problems means multiplication. We're trying to find the total number of students so we'll call this x.

Equation:

65=0.125x

Divide both sides by 0.125.

520=x

There are 520 students.