-83.48% is the change from 339 to 56
Calculation steps:
[( 56 - 339 ) ÷ 339] x 100 = -83.48%
Formula
Percentage change = [(56 - 339) / 339] x 100
Subtract the new number by the original number
56 - 339 = -283
-283 ÷ 339 = -0.8348082595870207
-0.8348082595870207 x 100 = -83.48%