-9.38% is the change from 672 to 609
Calculation steps:
[( 609 - 672 ) ÷ 672] x 100 = -9.38%
Formula
Percentage change = [(609 - 672) / 672] x 100
Subtract the new number by the original number
609 - 672 = -63
-63 ÷ 672 = -0.09375
-0.09375 x 100 = -9.38%