-49.05% is the change from 316 to 161
Calculation steps:
[( 161 - 316 ) ÷ 316] x 100 = -49.05%
Formula
Percentage change = [(161 - 316) / 316] x 100
Subtract the new number by the original number
161 - 316 = -155
-155 ÷ 316 = -0.49050632911392406
-0.49050632911392406 x 100 = -49.05%