-15.46% is the change from 964 to 815
Calculation steps:
[( 815 - 964 ) ÷ 964] x 100 = -15.46%
Formula
Percentage change = [(815 - 964) / 964] x 100
Subtract the new number by the original number
815 - 964 = -149
-149 ÷ 964 = -0.1545643153526971
-0.1545643153526971 x 100 = -15.46%