-16.08% is the change from 510 to 428
Calculation steps:
[( 428 - 510 ) ÷ 510] x 100 = -16.08%
Formula
Percentage change = [(428 - 510) / 510] x 100
Subtract the new number by the original number
428 - 510 = -82
-82 ÷ 510 = -0.1607843137254902
-0.1607843137254902 x 100 = -16.08%