-98.12% is the change from 637 to 12
Calculation steps:
[( 12 - 637 ) ÷ 637] x 100 = -98.12%
Formula
Percentage change = [(12 - 637) / 637] x 100
Subtract the new number by the original number
12 - 637 = -625
-625 ÷ 637 = -0.9811616954474097
-0.9811616954474097 x 100 = -98.12%