-31.98% is the change from 766 to 521
Calculation steps:
[( 521 - 766 ) ÷ 766] x 100 = -31.98%
Formula
Percentage change = [(521 - 766) / 766] x 100
Subtract the new number by the original number
521 - 766 = -245
-245 ÷ 766 = -0.3198433420365535
-0.3198433420365535 x 100 = -31.98%