-19.94% is the change from 642 to 514
Calculation steps:
[( 514 - 642 ) ÷ 642] x 100 = -19.94%
Formula
Percentage change = [(514 - 642) / 642] x 100
Subtract the new number by the original number
514 - 642 = -128
-128 ÷ 642 = -0.19937694704049844
-0.19937694704049844 x 100 = -19.94%