-92.06% is the change from 630 to 50
Calculation steps:
[( 50 - 630 ) ÷ 630] x 100 = -92.06%
Formula
Percentage change = [(50 - 630) / 630] x 100
Subtract the new number by the original number
50 - 630 = -580
-580 ÷ 630 = -0.9206349206349206
-0.9206349206349206 x 100 = -92.06%