-20.94% is the change from 339 to 268
Calculation steps:
[( 268 - 339 ) ÷ 339] x 100 = -20.94%
Formula
Percentage change = [(268 - 339) / 339] x 100
Subtract the new number by the original number
268 - 339 = -71
-71 ÷ 339 = -0.20943952802359883
-0.20943952802359883 x 100 = -20.94%