-55.88% is the change from 510 to 225
Calculation steps:
[( 225 - 510 ) ÷ 510] x 100 = -55.88%
Formula
Percentage change = [(225 - 510) / 510] x 100
Subtract the new number by the original number
225 - 510 = -285
-285 ÷ 510 = -0.5588235294117647
-0.5588235294117647 x 100 = -55.88%