-29.2% is the change from 911 to 645
Calculation steps:
[( 645 - 911 ) ÷ 911] x 100 = -29.2%
Formula
Percentage change = [(645 - 911) / 911] x 100
Subtract the new number by the original number
645 - 911 = -266
-266 ÷ 911 = -0.29198682766191
-0.29198682766191 x 100 = -29.2%