-35.69% is the change from 339 to 218
Calculation steps:
[( 218 - 339 ) ÷ 339] x 100 = -35.69%
Formula
Percentage change = [(218 - 339) / 339] x 100
Subtract the new number by the original number
218 - 339 = -121
-121 ÷ 339 = -0.35693215339233036
-0.35693215339233036 x 100 = -35.69%