-9.57% is the change from 815 to 737
Calculation steps:
[( 737 - 815 ) ÷ 815] x 100 = -9.57%
Formula
Percentage change = [(737 - 815) / 815] x 100
Subtract the new number by the original number
737 - 815 = -78
-78 ÷ 815 = -0.09570552147239264
-0.09570552147239264 x 100 = -9.57%