-75.74% is the change from 911 to 221
Calculation steps:
[( 221 - 911 ) ÷ 911] x 100 = -75.74%
Formula
Percentage change = [(221 - 911) / 911] x 100
Subtract the new number by the original number
221 - 911 = -690
-690 ÷ 911 = -0.7574094401756312
-0.7574094401756312 x 100 = -75.74%