-61.25% is the change from 511 to 198
Calculation steps:
[( 198 - 511 ) ÷ 511] x 100 = -61.25%
Formula
Percentage change = [(198 - 511) / 511] x 100
Subtract the new number by the original number
198 - 511 = -313
-313 ÷ 511 = -0.6125244618395304
-0.6125244618395304 x 100 = -61.25%