-17.57% is the change from 814 to 671
Calculation steps:
[( 671 - 814 ) ÷ 814] x 100 = -17.57%
Formula
Percentage change = [(671 - 814) / 814] x 100
Subtract the new number by the original number
671 - 814 = -143
-143 ÷ 814 = -0.17567567567567569
-0.17567567567567569 x 100 = -17.57%