-92.71% is the change from 645 to 47
Calculation steps:
[( 47 - 645 ) ÷ 645] x 100 = -92.71%
Formula
Percentage change = [(47 - 645) / 645] x 100
Subtract the new number by the original number
47 - 645 = -598
-598 ÷ 645 = -0.9271317829457364
-0.9271317829457364 x 100 = -92.71%