-60.39% is the change from 515 to 204
Calculation steps:
[( 204 - 515 ) ÷ 515] x 100 = -60.39%
Formula
Percentage change = [(204 - 515) / 515] x 100
Subtract the new number by the original number
204 - 515 = -311
-311 ÷ 515 = -0.6038834951456311
-0.6038834951456311 x 100 = -60.39%