Question

In January, the depth of a lake was 900 feet. In August, the depth of the lake was 810 feet. What is the percentage decrease of the depth of the lake from January to August? OA. 90% OB. 10% Oc. 11% OD. 12%​

Answer 1

OA because 900 x 0.9 = 810

Answer 2

January. 900ft. 100%
August. 810ft. X%
X=810•100/900
X=90%
100-90=10%
Percentage decrease is 10%
Correct answer is 10%