-92.31% is the change from 650 to 50
Calculation steps:
[( 50 - 650 ) ÷ 650] x 100 = -92.31%
Formula
Percentage change = [(50 - 650) / 650] x 100
Subtract the new number by the original number
50 - 650 = -600
-600 ÷ 650 = -0.9230769230769231
-0.9230769230769231 x 100 = -92.31%