-0.32% is the change from 316 to 315
Calculation steps:
[( 315 - 316 ) ÷ 316] x 100 = -0.32%
Formula
Percentage change = [(315 - 316) / 316] x 100
Subtract the new number by the original number
315 - 316 = -1
-1 ÷ 316 = -0.0031645569620253164
-0.0031645569620253164 x 100 = -0.32%