-30.92% is the change from 511 to 353
Calculation steps:
[( 353 - 511 ) ÷ 511] x 100 = -30.92%
Formula
Percentage change = [(353 - 511) / 511] x 100
Subtract the new number by the original number
353 - 511 = -158
-158 ÷ 511 = -0.30919765166340507
-0.30919765166340507 x 100 = -30.92%