-89.41% is the change from 642 to 68
Calculation steps:
[( 68 - 642 ) ÷ 642] x 100 = -89.41%
Formula
Percentage change = [(68 - 642) / 642] x 100
Subtract the new number by the original number
68 - 642 = -574
-574 ÷ 642 = -0.8940809968847352
-0.8940809968847352 x 100 = -89.41%