-81.37% is the change from 424 to 79
Calculation steps:
[( 79 - 424 ) ÷ 424] x 100 = -81.37%
Formula
Percentage change = [(79 - 424) / 424] x 100
Subtract the new number by the original number
79 - 424 = -345
-345 ÷ 424 = -0.8136792452830188
-0.8136792452830188 x 100 = -81.37%