-11.93% is the change from 729 to 642
Calculation steps:
[( 642 - 729 ) ÷ 729] x 100 = -11.93%
Formula
Percentage change = [(642 - 729) / 729] x 100
Subtract the new number by the original number
642 - 729 = -87
-87 ÷ 729 = -0.11934156378600823
-0.11934156378600823 x 100 = -11.93%