-40.66% is the change from 915 to 543
Calculation steps:
[( 543 - 915 ) ÷ 915] x 100 = -40.66%
Formula
Percentage change = [(543 - 915) / 915] x 100
Subtract the new number by the original number
543 - 915 = -372
-372 ÷ 915 = -0.4065573770491803
-0.4065573770491803 x 100 = -40.66%