-84.34% is the change from 664 to 104
Calculation steps:
[( 104 - 664 ) ÷ 664] x 100 = -84.34%
Formula
Percentage change = [(104 - 664) / 664] x 100
Subtract the new number by the original number
104 - 664 = -560
-560 ÷ 664 = -0.8433734939759037
-0.8433734939759037 x 100 = -84.34%