-81.61% is the change from 397 to 73
Calculation steps:
[( 73 - 397 ) ÷ 397] x 100 = -81.61%
Formula
Percentage change = [(73 - 397) / 397] x 100
Subtract the new number by the original number
73 - 397 = -324
-324 ÷ 397 = -0.8161209068010076
-0.8161209068010076 x 100 = -81.61%