-72.27% is the change from 815 to 226
Calculation steps:
[( 226 - 815 ) ÷ 815] x 100 = -72.27%
Formula
Percentage change = [(226 - 815) / 815] x 100
Subtract the new number by the original number
226 - 815 = -589
-589 ÷ 815 = -0.7226993865030675
-0.7226993865030675 x 100 = -72.27%