-0.98% is the change from 915 to 906
Calculation steps:
[( 906 - 915 ) ÷ 915] x 100 = -0.98%
Formula
Percentage change = [(906 - 915) / 915] x 100
Subtract the new number by the original number
906 - 915 = -9
-9 ÷ 915 = -0.009836065573770493
-0.009836065573770493 x 100 = -0.98%