-81.1% is the change from 418 to 79
Calculation steps:
[( 79 - 418 ) ÷ 418] x 100 = -81.1%
Formula
Percentage change = [(79 - 418) / 418] x 100
Subtract the new number by the original number
79 - 418 = -339
-339 ÷ 418 = -0.8110047846889952
-0.8110047846889952 x 100 = -81.1%