-7.5% is the change from 907 to 839
Calculation steps:
[( 839 - 907 ) ÷ 907] x 100 = -7.5%
Formula
Percentage change = [(839 - 907) / 907] x 100
Subtract the new number by the original number
839 - 907 = -68
-68 ÷ 907 = -0.07497243660418963
-0.07497243660418963 x 100 = -7.5%