-7.69% is the change from 936 to 864
Calculation steps:
[( 864 - 936 ) ÷ 936] x 100 = -7.69%
Formula
Percentage change = [(864 - 936) / 936] x 100
Subtract the new number by the original number
864 - 936 = -72
-72 ÷ 936 = -0.07692307692307693
-0.07692307692307693 x 100 = -7.69%