-38.75% is the change from 511 to 313
Calculation steps:
[( 313 - 511 ) ÷ 511] x 100 = -38.75%
Formula
Percentage change = [(313 - 511) / 511] x 100
Subtract the new number by the original number
313 - 511 = -198
-198 ÷ 511 = -0.38747553816046965
-0.38747553816046965 x 100 = -38.75%