-37.43% is the change from 521 to 326
Calculation steps:
[( 326 - 521 ) ÷ 521] x 100 = -37.43%
Formula
Percentage change = [(326 - 521) / 521] x 100
Subtract the new number by the original number
326 - 521 = -195
-195 ÷ 521 = -0.3742802303262956
-0.3742802303262956 x 100 = -37.43%