-17.65% is the change from 997 to 821
Calculation steps:
[( 821 - 997 ) ÷ 997] x 100 = -17.65%
Formula
Percentage change = [(821 - 997) / 997] x 100
Subtract the new number by the original number
821 - 997 = -176
-176 ÷ 997 = -0.1765295887662989
-0.1765295887662989 x 100 = -17.65%