-66.41% is the change from 917 to 308
Calculation steps:
[( 308 - 917 ) ÷ 917] x 100 = -66.41%
Formula
Percentage change = [(308 - 917) / 917] x 100
Subtract the new number by the original number
308 - 917 = -609
-609 ÷ 917 = -0.6641221374045801
-0.6641221374045801 x 100 = -66.41%