-7.27% is the change from 839 to 778
Calculation steps:
[( 778 - 839 ) ÷ 839] x 100 = -7.27%
Formula
Percentage change = [(778 - 839) / 839] x 100
Subtract the new number by the original number
778 - 839 = -61
-61 ÷ 839 = -0.07270560190703218
-0.07270560190703218 x 100 = -7.27%