Question

Tammy claims that if you increase a number by 10% and then increase the result by 10%, then you have increased the original number by 20%.
use proportions to show she is incorrect.

Answer 1

i used 10/100 = 2/20

Answer 2

so... 100 to 110
and, 110 goes to 121

Answer 3

Tammy is incorrect because 121 is not a 20% increase on 100