-28.87% is the change from 904 to 643
Calculation steps:
[( 643 - 904 ) ÷ 904] x 100 = -28.87%
Formula
Percentage change = [(643 - 904) / 904] x 100
Subtract the new number by the original number
643 - 904 = -261
-261 ÷ 904 = -0.288716814159292
-0.288716814159292 x 100 = -28.87%