-26.79% is the change from 642 to 470
Calculation steps:
[( 470 - 642 ) ÷ 642] x 100 = -26.79%
Formula
Percentage change = [(470 - 642) / 642] x 100
Subtract the new number by the original number
470 - 642 = -172
-172 ÷ 642 = -0.26791277258566976
-0.26791277258566976 x 100 = -26.79%