-37.78% is the change from 540 to 336
Calculation steps:
[( 336 - 540 ) ÷ 540] x 100 = -37.78%
Formula
Percentage change = [(336 - 540) / 540] x 100
Subtract the new number by the original number
336 - 540 = -204
-204 ÷ 540 = -0.37777777777777777
-0.37777777777777777 x 100 = -37.78%