-78.6% is the change from 500 to 107
Calculation steps:
[( 107 - 500 ) ÷ 500] x 100 = -78.6%
Formula
Percentage change = [(107 - 500) / 500] x 100
Subtract the new number by the original number
107 - 500 = -393
-393 ÷ 500 = -0.786
-0.786 x 100 = -78.6%