-59.41% is the change from 643 to 261
Calculation steps:
[( 261 - 643 ) ÷ 643] x 100 = -59.41%
Formula
Percentage change = [(261 - 643) / 643] x 100
Subtract the new number by the original number
261 - 643 = -382
-382 ÷ 643 = -0.5940902021772939
-0.5940902021772939 x 100 = -59.41%