-2.22% is the change from 316 to 309
Calculation steps:
[( 309 - 316 ) ÷ 316] x 100 = -2.22%
Formula
Percentage change = [(309 - 316) / 316] x 100
Subtract the new number by the original number
309 - 316 = -7
-7 ÷ 316 = -0.022151898734177215
-0.022151898734177215 x 100 = -2.22%