-70.24% is the change from 531 to 158
Calculation steps:
[( 158 - 531 ) ÷ 531] x 100 = -70.24%
Formula
Percentage change = [(158 - 531) / 531] x 100
Subtract the new number by the original number
158 - 531 = -373
-373 ÷ 531 = -0.7024482109227872
-0.7024482109227872 x 100 = -70.24%