-1.5% is the change from 866 to 853
Calculation steps:
[( 853 - 866 ) ÷ 866] x 100 = -1.5%
Formula
Percentage change = [(853 - 866) / 866] x 100
Subtract the new number by the original number
853 - 866 = -13
-13 ÷ 866 = -0.015011547344110854
-0.015011547344110854 x 100 = -1.5%