-31.18% is the change from 757 to 521
Calculation steps:
[( 521 - 757 ) ÷ 757] x 100 = -31.18%
Formula
Percentage change = [(521 - 757) / 757] x 100
Subtract the new number by the original number
521 - 757 = -236
-236 ÷ 757 = -0.31175693527080584
-0.31175693527080584 x 100 = -31.18%