-15.23% is the change from 906 to 768
Calculation steps:
[( 768 - 906 ) ÷ 906] x 100 = -15.23%
Formula
Percentage change = [(768 - 906) / 906] x 100
Subtract the new number by the original number
768 - 906 = -138
-138 ÷ 906 = -0.152317880794702
-0.152317880794702 x 100 = -15.23%