-18.15% is the change from 997 to 816
Calculation steps:
[( 816 - 997 ) ÷ 997] x 100 = -18.15%
Formula
Percentage change = [(816 - 997) / 997] x 100
Subtract the new number by the original number
816 - 997 = -181
-181 ÷ 997 = -0.1815446339017051
-0.1815446339017051 x 100 = -18.15%