-2.3% is the change from 915 to 894
Calculation steps:
[( 894 - 915 ) ÷ 915] x 100 = -2.3%
Formula
Percentage change = [(894 - 915) / 915] x 100
Subtract the new number by the original number
894 - 915 = -21
-21 ÷ 915 = -0.022950819672131147
-0.022950819672131147 x 100 = -2.3%