A tool room 28 feet by 35 feet was enlarged to the dimensions of 28 feet by 49 feet. By what percentage did the room size increase?

Answer 1

[(49 - 35) / 35] * 100%

Answer 2

I will assume that by "room size", you mean area

area of original = 28*35 = .... square ft
area of new = 28*49 = .... square ft
subtract to get the difference

percentage increase = difference/original area * 100%