-13.3% is the change from 940 to 815
Calculation steps:
[( 815 - 940 ) ÷ 940] x 100 = -13.3%
Formula
Percentage change = [(815 - 940) / 940] x 100
Subtract the new number by the original number
815 - 940 = -125
-125 ÷ 940 = -0.13297872340425532
-0.13297872340425532 x 100 = -13.3%