-98.74% is the change from 634 to 8
Calculation steps:
[( 8 - 634 ) ÷ 634] x 100 = -98.74%
Formula
Percentage change = [(8 - 634) / 634] x 100
Subtract the new number by the original number
8 - 634 = -626
-626 ÷ 634 = -0.9873817034700315
-0.9873817034700315 x 100 = -98.74%