-35.29% is the change from 510 to 330
Calculation steps:
[( 330 - 510 ) ÷ 510] x 100 = -35.29%
Formula
Percentage change = [(330 - 510) / 510] x 100
Subtract the new number by the original number
330 - 510 = -180
-180 ÷ 510 = -0.35294117647058826
-0.35294117647058826 x 100 = -35.29%