-42.07% is the change from 511 to 296
Calculation steps:
[( 296 - 511 ) ÷ 511] x 100 = -42.07%
Formula
Percentage change = [(296 - 511) / 511] x 100
Subtract the new number by the original number
296 - 511 = -215
-215 ÷ 511 = -0.4207436399217221
-0.4207436399217221 x 100 = -42.07%