-94.05% is the change from 672 to 40
Calculation steps:
[( 40 - 672 ) ÷ 672] x 100 = -94.05%
Formula
Percentage change = [(40 - 672) / 672] x 100
Subtract the new number by the original number
40 - 672 = -632
-632 ÷ 672 = -0.9404761904761905
-0.9404761904761905 x 100 = -94.05%