-41.2% is the change from 915 to 538
Calculation steps:
[( 538 - 915 ) ÷ 915] x 100 = -41.2%
Formula
Percentage change = [(538 - 915) / 915] x 100
Subtract the new number by the original number
538 - 915 = -377
-377 ÷ 915 = -0.41202185792349727
-0.41202185792349727 x 100 = -41.2%