-46.08% is the change from 510 to 275
Calculation steps:
[( 275 - 510 ) ÷ 510] x 100 = -46.08%
Formula
Percentage change = [(275 - 510) / 510] x 100
Subtract the new number by the original number
275 - 510 = -235
-235 ÷ 510 = -0.46078431372549017
-0.46078431372549017 x 100 = -46.08%