-18.86% is the change from 997 to 809
Calculation steps:
[( 809 - 997 ) ÷ 997] x 100 = -18.86%
Formula
Percentage change = [(809 - 997) / 997] x 100
Subtract the new number by the original number
809 - 997 = -188
-188 ÷ 997 = -0.18856569709127383
-0.18856569709127383 x 100 = -18.86%