-69.7% is the change from 637 to 193
Calculation steps:
[( 193 - 637 ) ÷ 637] x 100 = -69.7%
Formula
Percentage change = [(193 - 637) / 637] x 100
Subtract the new number by the original number
193 - 637 = -444
-444 ÷ 637 = -0.6970172684458399
-0.6970172684458399 x 100 = -69.7%