-84.15% is the change from 997 to 158
Calculation steps:
[( 158 - 997 ) ÷ 997] x 100 = -84.15%
Formula
Percentage change = [(158 - 997) / 997] x 100
Subtract the new number by the original number
158 - 997 = -839
-839 ÷ 997 = -0.8415245737211635
-0.8415245737211635 x 100 = -84.15%