-84.71% is the change from 641 to 98
Calculation steps:
[( 98 - 641 ) ÷ 641] x 100 = -84.71%
Formula
Percentage change = [(98 - 641) / 641] x 100
Subtract the new number by the original number
98 - 641 = -543
-543 ÷ 641 = -0.8471138845553822
-0.8471138845553822 x 100 = -84.71%