-98.76% is the change from 644 to 8
Calculation steps:
[( 8 - 644 ) ÷ 644] x 100 = -98.76%
Formula
Percentage change = [(8 - 644) / 644] x 100
Subtract the new number by the original number
8 - 644 = -636
-636 ÷ 644 = -0.9875776397515528
-0.9875776397515528 x 100 = -98.76%