-17.04% is the change from 628 to 521
Calculation steps:
[( 521 - 628 ) ÷ 628] x 100 = -17.04%
Formula
Percentage change = [(521 - 628) / 628] x 100
Subtract the new number by the original number
521 - 628 = -107
-107 ÷ 628 = -0.17038216560509553
-0.17038216560509553 x 100 = -17.04%