-61.06% is the change from 511 to 199
Calculation steps:
[( 199 - 511 ) ÷ 511] x 100 = -61.06%
Formula
Percentage change = [(199 - 511) / 511] x 100
Subtract the new number by the original number
199 - 511 = -312
-312 ÷ 511 = -0.6105675146771037
-0.6105675146771037 x 100 = -61.06%