-55.73% is the change from 515 to 228
Calculation steps:
[( 228 - 515 ) ÷ 515] x 100 = -55.73%
Formula
Percentage change = [(228 - 515) / 515] x 100
Subtract the new number by the original number
228 - 515 = -287
-287 ÷ 515 = -0.5572815533980583
-0.5572815533980583 x 100 = -55.73%