-86.75% is the change from 664 to 88
Calculation steps:
[( 88 - 664 ) ÷ 664] x 100 = -86.75%
Formula
Percentage change = [(88 - 664) / 664] x 100
Subtract the new number by the original number
88 - 664 = -576
-576 ÷ 664 = -0.8674698795180723
-0.8674698795180723 x 100 = -86.75%