-0.13% is the change from 771 to 770
Calculation steps:
[( 770 - 771 ) ÷ 771] x 100 = -0.13%
Formula
Percentage change = [(770 - 771) / 771] x 100
Subtract the new number by the original number
770 - 771 = -1
-1 ÷ 771 = -0.0012970168612191958
-0.0012970168612191958 x 100 = -0.13%