-18.79% is the change from 628 to 510
Calculation steps:
[( 510 - 628 ) ÷ 628] x 100 = -18.79%
Formula
Percentage change = [(510 - 628) / 628] x 100
Subtract the new number by the original number
510 - 628 = -118
-118 ÷ 628 = -0.18789808917197454
-0.18789808917197454 x 100 = -18.79%