-88.7% is the change from 664 to 75
Calculation steps:
[( 75 - 664 ) ÷ 664] x 100 = -88.7%
Formula
Percentage change = [(75 - 664) / 664] x 100
Subtract the new number by the original number
75 - 664 = -589
-589 ÷ 664 = -0.8870481927710844
-0.8870481927710844 x 100 = -88.7%