-15.97% is the change from 764 to 642
Calculation steps:
[( 642 - 764 ) ÷ 764] x 100 = -15.97%
Formula
Percentage change = [(642 - 764) / 764] x 100
Subtract the new number by the original number
642 - 764 = -122
-122 ÷ 764 = -0.15968586387434555
-0.15968586387434555 x 100 = -15.97%