-61.31% is the change from 641 to 248
Calculation steps:
[( 248 - 641 ) ÷ 641] x 100 = -61.31%
Formula
Percentage change = [(248 - 641) / 641] x 100
Subtract the new number by the original number
248 - 641 = -393
-393 ÷ 641 = -0.6131045241809673
-0.6131045241809673 x 100 = -61.31%