What is the ratio 18 to 27 written as a fraction in lowest terms? 3/5 2/3 6/9 9/13

Bob is putting books on a shelf and takes a break after filling 18 1/2 inches on the book shelf. the book shelf is now 2/3 full. how long is the entire bookshelf?

Aregular pentagon with a perimeter of 21 inches is dilated by a scale factor of 5/3 to create a new pentagon. what is the perimeter of the new pentagon?

What is the measure of angle 1? a.28 b.152 c.168 d.64