-15.81% is the change from 968 to 815
Calculation steps:
[( 815 - 968 ) ÷ 968] x 100 = -15.81%
Formula
Percentage change = [(815 - 968) / 968] x 100
Subtract the new number by the original number
815 - 968 = -153
-153 ÷ 968 = -0.15805785123966942
-0.15805785123966942 x 100 = -15.81%