-15.01% is the change from 906 to 770
Calculation steps:
[( 770 - 906 ) ÷ 906] x 100 = -15.01%
Formula
Percentage change = [(770 - 906) / 906] x 100
Subtract the new number by the original number
770 - 906 = -136
-136 ÷ 906 = -0.15011037527593818
-0.15011037527593818 x 100 = -15.01%