-79.38% is the change from 485 to 100
Calculation steps:
[( 100 - 485 ) ÷ 485] x 100 = -79.38%
Formula
Percentage change = [(100 - 485) / 485] x 100
Subtract the new number by the original number
100 - 485 = -385
-385 ÷ 485 = -0.7938144329896907
-0.7938144329896907 x 100 = -79.38%