-27.22% is the change from 911 to 663
Calculation steps:
[( 663 - 911 ) ÷ 911] x 100 = -27.22%
Formula
Percentage change = [(663 - 911) / 911] x 100
Subtract the new number by the original number
663 - 911 = -248
-248 ÷ 911 = -0.2722283205268935
-0.2722283205268935 x 100 = -27.22%