-6.78% is the change from 339 to 316
Calculation steps:
[( 316 - 339 ) ÷ 339] x 100 = -6.78%
Formula
Percentage change = [(316 - 339) / 339] x 100
Subtract the new number by the original number
316 - 339 = -23
-23 ÷ 339 = -0.06784660766961652
-0.06784660766961652 x 100 = -6.78%