-84.05% is the change from 997 to 159
Calculation steps:
[( 159 - 997 ) ÷ 997] x 100 = -84.05%
Formula
Percentage change = [(159 - 997) / 997] x 100
Subtract the new number by the original number
159 - 997 = -838
-838 ÷ 997 = -0.8405215646940822
-0.8405215646940822 x 100 = -84.05%