-28.85% is the change from 936 to 666
Calculation steps:
[( 666 - 936 ) ÷ 936] x 100 = -28.85%
Formula
Percentage change = [(666 - 936) / 936] x 100
Subtract the new number by the original number
666 - 936 = -270
-270 ÷ 936 = -0.28846153846153844
-0.28846153846153844 x 100 = -28.85%