-31.61% is the change from 911 to 623
Calculation steps:
[( 623 - 911 ) ÷ 911] x 100 = -31.61%
Formula
Percentage change = [(623 - 911) / 911] x 100
Subtract the new number by the original number
623 - 911 = -288
-288 ÷ 911 = -0.31613611416026344
-0.31613611416026344 x 100 = -31.61%