-73.16% is the change from 339 to 91
Calculation steps:
[( 91 - 339 ) ÷ 339] x 100 = -73.16%
Formula
Percentage change = [(91 - 339) / 339] x 100
Subtract the new number by the original number
91 - 339 = -248
-248 ÷ 339 = -0.7315634218289085
-0.7315634218289085 x 100 = -73.16%