-96.08% is the change from 664 to 26
Calculation steps:
[( 26 - 664 ) ÷ 664] x 100 = -96.08%
Formula
Percentage change = [(26 - 664) / 664] x 100
Subtract the new number by the original number
26 - 664 = -638
-638 ÷ 664 = -0.9608433734939759
-0.9608433734939759 x 100 = -96.08%