-39.45% is the change from 915 to 554
Calculation steps:
[( 554 - 915 ) ÷ 915] x 100 = -39.45%
Formula
Percentage change = [(554 - 915) / 915] x 100
Subtract the new number by the original number
554 - 915 = -361
-361 ÷ 915 = -0.3945355191256831
-0.3945355191256831 x 100 = -39.45%