-5.37% is the change from 521 to 493
Calculation steps:
[( 493 - 521 ) ÷ 521] x 100 = -5.37%
Formula
Percentage change = [(493 - 521) / 521] x 100
Subtract the new number by the original number
493 - 521 = -28
-28 ÷ 521 = -0.053742802303262956
-0.053742802303262956 x 100 = -5.37%