-37.23% is the change from 642 to 403
Calculation steps:
[( 403 - 642 ) ÷ 642] x 100 = -37.23%
Formula
Percentage change = [(403 - 642) / 642] x 100
Subtract the new number by the original number
403 - 642 = -239
-239 ÷ 642 = -0.37227414330218067
-0.37227414330218067 x 100 = -37.23%