-91.45% is the change from 339 to 29
Calculation steps:
[( 29 - 339 ) ÷ 339] x 100 = -91.45%
Formula
Percentage change = [(29 - 339) / 339] x 100
Subtract the new number by the original number
29 - 339 = -310
-310 ÷ 339 = -0.9144542772861357
-0.9144542772861357 x 100 = -91.45%