-26.34% is the change from 839 to 618
Calculation steps:
[( 618 - 839 ) ÷ 839] x 100 = -26.34%
Formula
Percentage change = [(618 - 839) / 839] x 100
Subtract the new number by the original number
618 - 839 = -221
-221 ÷ 839 = -0.2634088200238379
-0.2634088200238379 x 100 = -26.34%