-81.67% is the change from 431 to 79
Calculation steps:
[( 79 - 431 ) ÷ 431] x 100 = -81.67%
Formula
Percentage change = [(79 - 431) / 431] x 100
Subtract the new number by the original number
79 - 431 = -352
-352 ÷ 431 = -0.8167053364269141
-0.8167053364269141 x 100 = -81.67%