-79.06% is the change from 339 to 71
Calculation steps:
[( 71 - 339 ) ÷ 339] x 100 = -79.06%
Formula
Percentage change = [(71 - 339) / 339] x 100
Subtract the new number by the original number
71 - 339 = -268
-268 ÷ 339 = -0.7905604719764012
-0.7905604719764012 x 100 = -79.06%