-72.7% is the change from 630 to 172
Calculation steps:
[( 172 - 630 ) ÷ 630] x 100 = -72.7%
Formula
Percentage change = [(172 - 630) / 630] x 100
Subtract the new number by the original number
172 - 630 = -458
-458 ÷ 630 = -0.726984126984127
-0.726984126984127 x 100 = -72.7%