-94.28% is the change from 664 to 38
Calculation steps:
[( 38 - 664 ) ÷ 664] x 100 = -94.28%
Formula
Percentage change = [(38 - 664) / 664] x 100
Subtract the new number by the original number
38 - 664 = -626
-626 ÷ 664 = -0.9427710843373494
-0.9427710843373494 x 100 = -94.28%