-91.89% is the change from 641 to 52
Calculation steps:
[( 52 - 641 ) ÷ 641] x 100 = -91.89%
Formula
Percentage change = [(52 - 641) / 641] x 100
Subtract the new number by the original number
52 - 641 = -589
-589 ÷ 641 = -0.9188767550702028
-0.9188767550702028 x 100 = -91.89%