-16.64% is the change from 625 to 521
Calculation steps:
[( 521 - 625 ) ÷ 625] x 100 = -16.64%
Formula
Percentage change = [(521 - 625) / 625] x 100
Subtract the new number by the original number
521 - 625 = -104
-104 ÷ 625 = -0.1664
-0.1664 x 100 = -16.64%