-0.22% is the change from 915 to 913
Calculation steps:
[( 913 - 915 ) ÷ 915] x 100 = -0.22%
Formula
Percentage change = [(913 - 915) / 915] x 100
Subtract the new number by the original number
913 - 915 = -2
-2 ÷ 915 = -0.002185792349726776
-0.002185792349726776 x 100 = -0.22%