You plant a tree that is 36 inches tall. after one year, the tree is 43 inches tall. which expression describes the percent of increase in the tree's height?

36 - 100%43 - x  %
we multiply by cross ->  36 * x = 100 / 43 
we should remove '100%' from new value, because we find only increase.. no new value in percent.
x + 100 = (43 * 100)/36 
x =  4300/36 - 100x = 119+ 16/36 -100x = 19 +4/9

the answer is 

19.44% increase

HOW TO FIND THE GROWTH PERCENTAGE:

Percent Problem: 
You need to calculate percent increase from 36 to 43. 

First Step: Find the difference between two numbers, in this case, it's 10 - 2 = 8. 

Second Step: Take the difference, 7, and divide by the original number: 7/36 = 0.194444. 

Last, convert the decimal to a percent.

FINAL ANSWER: 19.44%

Wish i could u but i just don’t know the answer