-88.54% is the change from 637 to 73
Calculation steps:
[( 73 - 637 ) ÷ 637] x 100 = -88.54%
Formula
Percentage change = [(73 - 637) / 637] x 100
Subtract the new number by the original number
73 - 637 = -564
-564 ÷ 637 = -0.8854003139717426
-0.8854003139717426 x 100 = -88.54%