-4.5% is the change from 912 to 871
Calculation steps:
[( 871 - 912 ) ÷ 912] x 100 = -4.5%
Formula
Percentage change = [(871 - 912) / 912] x 100
Subtract the new number by the original number
871 - 912 = -41
-41 ÷ 912 = -0.044956140350877194
-0.044956140350877194 x 100 = -4.5%