-79.64% is the change from 506 to 103
Calculation steps:
[( 103 - 506 ) ÷ 506] x 100 = -79.64%
Formula
Percentage change = [(103 - 506) / 506] x 100
Subtract the new number by the original number
103 - 506 = -403
-403 ÷ 506 = -0.7964426877470355
-0.7964426877470355 x 100 = -79.64%