-84.45% is the change from 997 to 155
Calculation steps:
[( 155 - 997 ) ÷ 997] x 100 = -84.45%
Formula
Percentage change = [(155 - 997) / 997] x 100
Subtract the new number by the original number
155 - 997 = -842
-842 ÷ 997 = -0.8445336008024072
-0.8445336008024072 x 100 = -84.45%