-93.3% is the change from 642 to 43
Calculation steps:
[( 43 - 642 ) ÷ 642] x 100 = -93.3%
Formula
Percentage change = [(43 - 642) / 642] x 100
Subtract the new number by the original number
43 - 642 = -599
-599 ÷ 642 = -0.9330218068535826
-0.9330218068535826 x 100 = -93.3%