-17.88% is the change from 783 to 643
Calculation steps:
[( 643 - 783 ) ÷ 783] x 100 = -17.88%
Formula
Percentage change = [(643 - 783) / 783] x 100
Subtract the new number by the original number
643 - 783 = -140
-140 ÷ 783 = -0.17879948914431673
-0.17879948914431673 x 100 = -17.88%