-62.84% is the change from 915 to 340
Calculation steps:
[( 340 - 915 ) ÷ 915] x 100 = -62.84%
Formula
Percentage change = [(340 - 915) / 915] x 100
Subtract the new number by the original number
340 - 915 = -575
-575 ÷ 915 = -0.6284153005464481
-0.6284153005464481 x 100 = -62.84%