-98.27% is the change from 637 to 11
Calculation steps:
[( 11 - 637 ) ÷ 637] x 100 = -98.27%
Formula
Percentage change = [(11 - 637) / 637] x 100
Subtract the new number by the original number
11 - 637 = -626
-626 ÷ 637 = -0.9827315541601256
-0.9827315541601256 x 100 = -98.27%