-18.09% is the change from 785 to 643
Calculation steps:
[( 643 - 785 ) ÷ 785] x 100 = -18.09%
Formula
Percentage change = [(643 - 785) / 785] x 100
Subtract the new number by the original number
643 - 785 = -142
-142 ÷ 785 = -0.18089171974522292
-0.18089171974522292 x 100 = -18.09%