-34.63% is the change from 797 to 521
Calculation steps:
[( 521 - 797 ) ÷ 797] x 100 = -34.63%
Formula
Percentage change = [(521 - 797) / 797] x 100
Subtract the new number by the original number
521 - 797 = -276
-276 ÷ 797 = -0.3462986198243413
-0.3462986198243413 x 100 = -34.63%