-21.1% is the change from 673 to 531
Calculation steps:
[( 531 - 673 ) ÷ 673] x 100 = -21.1%
Formula
Percentage change = [(531 - 673) / 673] x 100
Subtract the new number by the original number
531 - 673 = -142
-142 ÷ 673 = -0.21099554234769688
-0.21099554234769688 x 100 = -21.1%