-30.08% is the change from 911 to 637
Calculation steps:
[( 637 - 911 ) ÷ 911] x 100 = -30.08%
Formula
Percentage change = [(637 - 911) / 911] x 100
Subtract the new number by the original number
637 - 911 = -274
-274 ÷ 911 = -0.300768386388584
-0.300768386388584 x 100 = -30.08%