-92.39% is the change from 657 to 50
Calculation steps:
[( 50 - 657 ) ÷ 657] x 100 = -92.39%
Formula
Percentage change = [(50 - 657) / 657] x 100
Subtract the new number by the original number
50 - 657 = -607
-607 ÷ 657 = -0.923896499238965
-0.923896499238965 x 100 = -92.39%