If 400 people in your neighborhood had a cell phone last year and one year later 500 people had a cell phone, what percent has cell phone ownership increased?

Amount of increase = 100 users
100/400 = 0.25 = 25%

Horizontal change or the change of x

You can find the area of a rectangle by multiplying the length and height. so multiply 1/2*7/4(which is the simpler version of 1 3/4) and you get 7/8 as your answer.