-6.7% is the change from 911 to 850
Calculation steps:
[( 850 - 911 ) ÷ 911] x 100 = -6.7%
Formula
Percentage change = [(850 - 911) / 911] x 100
Subtract the new number by the original number
850 - 911 = -61
-61 ÷ 911 = -0.06695938529088913
-0.06695938529088913 x 100 = -6.7%