-15.02% is the change from 959 to 815
Calculation steps:
[( 815 - 959 ) ÷ 959] x 100 = -15.02%
Formula
Percentage change = [(815 - 959) / 959] x 100
Subtract the new number by the original number
815 - 959 = -144
-144 ÷ 959 = -0.15015641293013557
-0.15015641293013557 x 100 = -15.02%