-46.47% is the change from 510 to 273
Calculation steps:
[( 273 - 510 ) ÷ 510] x 100 = -46.47%
Formula
Percentage change = [(273 - 510) / 510] x 100
Subtract the new number by the original number
273 - 510 = -237
-237 ÷ 510 = -0.4647058823529412
-0.4647058823529412 x 100 = -46.47%