-79.47% is the change from 838 to 172
Calculation steps:
[( 172 - 838 ) ÷ 838] x 100 = -79.47%
Formula
Percentage change = [(172 - 838) / 838] x 100
Subtract the new number by the original number
172 - 838 = -666
-666 ÷ 838 = -0.7947494033412887
-0.7947494033412887 x 100 = -79.47%