-86.83% is the change from 600 to 79
Calculation steps:
[( 79 - 600 ) ÷ 600] x 100 = -86.83%
Formula
Percentage change = [(79 - 600) / 600] x 100
Subtract the new number by the original number
79 - 600 = -521
-521 ÷ 600 = -0.8683333333333333
-0.8683333333333333 x 100 = -86.83%