-30.36% is the change from 336 to 234
Calculation steps:
[( 234 - 336 ) ÷ 336] x 100 = -30.36%
Formula
Percentage change = [(234 - 336) / 336] x 100
Subtract the new number by the original number
234 - 336 = -102
-102 ÷ 336 = -0.30357142857142855
-0.30357142857142855 x 100 = -30.36%