-18.98% is the change from 511 to 414
Calculation steps:
[( 414 - 511 ) ÷ 511] x 100 = -18.98%
Formula
Percentage change = [(414 - 511) / 511] x 100
Subtract the new number by the original number
414 - 511 = -97
-97 ÷ 511 = -0.1898238747553816
-0.1898238747553816 x 100 = -18.98%