-1.43% is the change from 839 to 827
Calculation steps:
[( 827 - 839 ) ÷ 839] x 100 = -1.43%
Formula
Percentage change = [(827 - 839) / 839] x 100
Subtract the new number by the original number
827 - 839 = -12
-12 ÷ 839 = -0.014302741358760428
-0.014302741358760428 x 100 = -1.43%