-76.79% is the change from 349 to 81
Calculation steps:
[( 81 - 349 ) ÷ 349] x 100 = -76.79%
Formula
Percentage change = [(81 - 349) / 349] x 100
Subtract the new number by the original number
81 - 349 = -268
-268 ÷ 349 = -0.7679083094555874
-0.7679083094555874 x 100 = -76.79%