-90.34% is the change from 642 to 62
Calculation steps:
[( 62 - 642 ) ÷ 642] x 100 = -90.34%
Formula
Percentage change = [(62 - 642) / 642] x 100
Subtract the new number by the original number
62 - 642 = -580
-580 ÷ 642 = -0.9034267912772586
-0.9034267912772586 x 100 = -90.34%