-15.95% is the change from 765 to 643
Calculation steps:
[( 643 - 765 ) ÷ 765] x 100 = -15.95%
Formula
Percentage change = [(643 - 765) / 765] x 100
Subtract the new number by the original number
643 - 765 = -122
-122 ÷ 765 = -0.15947712418300652
-0.15947712418300652 x 100 = -15.95%