-92.68% is the change from 642 to 47
Calculation steps:
[( 47 - 642 ) ÷ 642] x 100 = -92.68%
Formula
Percentage change = [(47 - 642) / 642] x 100
Subtract the new number by the original number
47 - 642 = -595
-595 ÷ 642 = -0.926791277258567
-0.926791277258567 x 100 = -92.68%