-20.51% is the change from 673 to 535
Calculation steps:
[( 535 - 673 ) ÷ 673] x 100 = -20.51%
Formula
Percentage change = [(535 - 673) / 673] x 100
Subtract the new number by the original number
535 - 673 = -138
-138 ÷ 673 = -0.2050520059435364
-0.2050520059435364 x 100 = -20.51%