-26.6% is the change from 876 to 643
Calculation steps:
[( 643 - 876 ) ÷ 876] x 100 = -26.6%
Formula
Percentage change = [(643 - 876) / 876] x 100
Subtract the new number by the original number
643 - 876 = -233
-233 ÷ 876 = -0.2659817351598174
-0.2659817351598174 x 100 = -26.6%