-15.82% is the change from 316 to 266
Calculation steps:
[( 266 - 316 ) ÷ 316] x 100 = -15.82%
Formula
Percentage change = [(266 - 316) / 316] x 100
Subtract the new number by the original number
266 - 316 = -50
-50 ÷ 316 = -0.15822784810126583
-0.15822784810126583 x 100 = -15.82%