-30.19% is the change from 911 to 636
Calculation steps:
[( 636 - 911 ) ÷ 911] x 100 = -30.19%
Formula
Percentage change = [(636 - 911) / 911] x 100
Subtract the new number by the original number
636 - 911 = -275
-275 ÷ 911 = -0.3018660812294182
-0.3018660812294182 x 100 = -30.19%