-61.15% is the change from 641 to 249
Calculation steps:
[( 249 - 641 ) ÷ 641] x 100 = -61.15%
Formula
Percentage change = [(249 - 641) / 641] x 100
Subtract the new number by the original number
249 - 641 = -392
-392 ÷ 641 = -0.6115444617784711
-0.6115444617784711 x 100 = -61.15%