-83.74% is the change from 486 to 79
Calculation steps:
[( 79 - 486 ) ÷ 486] x 100 = -83.74%
Formula
Percentage change = [(79 - 486) / 486] x 100
Subtract the new number by the original number
79 - 486 = -407
-407 ÷ 486 = -0.8374485596707819
-0.8374485596707819 x 100 = -83.74%