How do i do this question on a calculator (as shown below) note the calculator only can write out equations

This is the number of parts out of 100, the numerator of a fraction where the denominator is 100. submit

Atheater wants to build movable steps that they can use to go on and off the stage. they want the steps to have enough space inside so they can also be used to store props. how much space is inside the steps?

Aye asap pls ! markin da brainiest too ! btw da step choices are all add, distribute, divide, n subtract