-38.05% is the change from 339 to 210
Calculation steps:
[( 210 - 339 ) ÷ 339] x 100 = -38.05%
Formula
Percentage change = [(210 - 339) / 339] x 100
Subtract the new number by the original number
210 - 339 = -129
-129 ÷ 339 = -0.3805309734513274
-0.3805309734513274 x 100 = -38.05%