-48.53% is the change from 511 to 263
Calculation steps:
[( 263 - 511 ) ÷ 511] x 100 = -48.53%
Formula
Percentage change = [(263 - 511) / 511] x 100
Subtract the new number by the original number
263 - 511 = -248
-248 ÷ 511 = -0.48532289628180036
-0.48532289628180036 x 100 = -48.53%