-83.64% is the change from 972 to 159
Calculation steps:
[( 159 - 972 ) ÷ 972] x 100 = -83.64%
Formula
Percentage change = [(159 - 972) / 972] x 100
Subtract the new number by the original number
159 - 972 = -813
-813 ÷ 972 = -0.8364197530864198
-0.8364197530864198 x 100 = -83.64%