-31.65% is the change from 316 to 216
Calculation steps:
[( 216 - 316 ) ÷ 316] x 100 = -31.65%
Formula
Percentage change = [(216 - 316) / 316] x 100
Subtract the new number by the original number
216 - 316 = -100
-100 ÷ 316 = -0.31645569620253167
-0.31645569620253167 x 100 = -31.65%