-57.54% is the change from 643 to 273
Calculation steps:
[( 273 - 643 ) ÷ 643] x 100 = -57.54%
Formula
Percentage change = [(273 - 643) / 643] x 100
Subtract the new number by the original number
273 - 643 = -370
-370 ÷ 643 = -0.5754276827371695
-0.5754276827371695 x 100 = -57.54%