The ratio of the perimeters of two rectangles is 5 to 8. The perimeter of the larger rectangle is 72 inches. What is the perimeter of the smaller rectangle?

@sammixboo
@DivineSolar
@77777jeannie77777

Question

The ratio of the perimeters of two rectangles is 5 to 8. The perimeter of the larger rectangle is 72 inches. What is the perimeter of the smaller rectangle? 

@sammixboo 
@DivineSolar 
@77777jeannie77777

camerondoherty · Answer

Lets start off like this:
is 72 divisible by 8 or by 5?

divinesolar · Answer

72 x (5/8) = 45

anonymous · Answer

a 115.2 inches

b 45 inches 

c 40 inches 

d 16.4 inches

anonymous · Answer

by 8

divinesolar · Answer

Or write it like this ->  (5/8) (72) = 5 (9) = 45

divinesolar · Answer

Either way you get 45.

anonymous · Answer

http://www.webmath.com/k8ratio.html

camerondoherty · Answer

Ok, so what times 8 equals 72?

anonymous · Answer

9

anonymous · Answer

thank you guys!!!!!!!!!!! by the way for your help

divinesolar · Answer

Even though i have answered it i suppose my help is no longer needed :)! Good luck with the rest sumgirl! :)

camerondoherty · Answer

Yes, so to increase the ratio, you multiply both sides by 9
5 times 9 equals 45
So 45 is the correct answer ^.^

camerondoherty · Answer

The ratio end up looking like this 45:72

anonymous · Answer

;) Good job :) @sumgirl good luck!!!

anonymous · Answer

thanks

divinesolar · Answer

Sure thing.