-52.64% is the change from 511 to 242
Calculation steps:
[( 242 - 511 ) ÷ 511] x 100 = -52.64%
Formula
Percentage change = [(242 - 511) / 511] x 100
Subtract the new number by the original number
242 - 511 = -269
-269 ÷ 511 = -0.5264187866927593
-0.5264187866927593 x 100 = -52.64%