Answer:
The answer to your question is 12.5 %
Step-by-step explanation:
Data
length = 10 ft
width = 5 ft
Proportion 9/8
Process
1.- Calculate the perimeter of the original rectangle
Perimeter 1 = 2l + 2w
-Substitution
= 2(10) + 2(5)
= 20 + 10
= 30 ft
2.- Calculate the dimensions of the second rectangle
length = 9/8 (10) = 90/8 = 45/4
width = 9/8 (5) = 45/8
3.- Calculate the perimeter of the second rectangle
Perimeter 2 = 2(45/4) + 2(45/8)
= 22.5 + 11.25
= 33.75 ft
4.- Calculate the percent of change
30 ft -------------------- 100%
33.75 ft ---------------- x
x = (33.75 x 100) / 30
x = 3375/30
x = 112.5
Change = 112.5 - 100
Result
= 12.5 %
