-43.39% is the change from 915 to 518
Calculation steps:
[( 518 - 915 ) ÷ 915] x 100 = -43.39%
Formula
Percentage change = [(518 - 915) / 915] x 100
Subtract the new number by the original number
518 - 915 = -397
-397 ÷ 915 = -0.43387978142076505
-0.43387978142076505 x 100 = -43.39%