-0.32% is the change from 312 to 311
Calculation steps:
[( 311 - 312 ) ÷ 312] x 100 = -0.32%
Formula
Percentage change = [(311 - 312) / 312] x 100
Subtract the new number by the original number
311 - 312 = -1
-1 ÷ 312 = -0.003205128205128205
-0.003205128205128205 x 100 = -0.32%