-16.15% is the change from 972 to 815
Calculation steps:
[( 815 - 972 ) ÷ 972] x 100 = -16.15%
Formula
Percentage change = [(815 - 972) / 972] x 100
Subtract the new number by the original number
815 - 972 = -157
-157 ÷ 972 = -0.16152263374485595
-0.16152263374485595 x 100 = -16.15%