-63.67% is the change from 911 to 331
Calculation steps:
[( 331 - 911 ) ÷ 911] x 100 = -63.67%
Formula
Percentage change = [(331 - 911) / 911] x 100
Subtract the new number by the original number
331 - 911 = -580
-580 ÷ 911 = -0.6366630076838639
-0.6366630076838639 x 100 = -63.67%