-51.15% is the change from 915 to 447
Calculation steps:
[( 447 - 915 ) ÷ 915] x 100 = -51.15%
Formula
Percentage change = [(447 - 915) / 915] x 100
Subtract the new number by the original number
447 - 915 = -468
-468 ÷ 915 = -0.5114754098360655
-0.5114754098360655 x 100 = -51.15%