-58.63% is the change from 643 to 266
Calculation steps:
[( 266 - 643 ) ÷ 643] x 100 = -58.63%
Formula
Percentage change = [(266 - 643) / 643] x 100
Subtract the new number by the original number
266 - 643 = -377
-377 ÷ 643 = -0.5863141524105754
-0.5863141524105754 x 100 = -58.63%