-53.01% is the change from 515 to 242
Calculation steps:
[( 242 - 515 ) ÷ 515] x 100 = -53.01%
Formula
Percentage change = [(242 - 515) / 515] x 100
Subtract the new number by the original number
242 - 515 = -273
-273 ÷ 515 = -0.5300970873786408
-0.5300970873786408 x 100 = -53.01%