-86.34% is the change from 644 to 88
Calculation steps:
[( 88 - 644 ) ÷ 644] x 100 = -86.34%
Formula
Percentage change = [(88 - 644) / 644] x 100
Subtract the new number by the original number
88 - 644 = -556
-556 ÷ 644 = -0.8633540372670807
-0.8633540372670807 x 100 = -86.34%