-12.73% is the change from 597 to 521
Calculation steps:
[( 521 - 597 ) ÷ 597] x 100 = -12.73%
Formula
Percentage change = [(521 - 597) / 597] x 100
Subtract the new number by the original number
521 - 597 = -76
-76 ÷ 597 = -0.1273031825795645
-0.1273031825795645 x 100 = -12.73%