-93.52% is the change from 664 to 43
Calculation steps:
[( 43 - 664 ) ÷ 664] x 100 = -93.52%
Formula
Percentage change = [(43 - 664) / 664] x 100
Subtract the new number by the original number
43 - 664 = -621
-621 ÷ 664 = -0.9352409638554217
-0.9352409638554217 x 100 = -93.52%