-83.97% is the change from 973 to 156
Calculation steps:
[( 156 - 973 ) ÷ 973] x 100 = -83.97%
Formula
Percentage change = [(156 - 973) / 973] x 100
Subtract the new number by the original number
156 - 973 = -817
-817 ÷ 973 = -0.8396711202466598
-0.8396711202466598 x 100 = -83.97%