-62.62% is the change from 511 to 191
Calculation steps:
[( 191 - 511 ) ÷ 511] x 100 = -62.62%
Formula
Percentage change = [(191 - 511) / 511] x 100
Subtract the new number by the original number
191 - 511 = -320
-320 ÷ 511 = -0.6262230919765166
-0.6262230919765166 x 100 = -62.62%