-37.88% is the change from 866 to 538
Calculation steps:
[( 538 - 866 ) ÷ 866] x 100 = -37.88%
Formula
Percentage change = [(538 - 866) / 866] x 100
Subtract the new number by the original number
538 - 866 = -328
-328 ÷ 866 = -0.3787528868360277
-0.3787528868360277 x 100 = -37.88%