-18.19% is the change from 786 to 643
Calculation steps:
[( 643 - 786 ) ÷ 786] x 100 = -18.19%
Formula
Percentage change = [(643 - 786) / 786] x 100
Subtract the new number by the original number
643 - 786 = -143
-143 ÷ 786 = -0.18193384223918574
-0.18193384223918574 x 100 = -18.19%