-23.51% is the change from 336 to 257
Calculation steps:
[( 257 - 336 ) ÷ 336] x 100 = -23.51%
Formula
Percentage change = [(257 - 336) / 336] x 100
Subtract the new number by the original number
257 - 336 = -79
-79 ÷ 336 = -0.23511904761904762
-0.23511904761904762 x 100 = -23.51%