-37.73% is the change from 644 to 401
Calculation steps:
[( 401 - 644 ) ÷ 644] x 100 = -37.73%
Formula
Percentage change = [(401 - 644) / 644] x 100
Subtract the new number by the original number
401 - 644 = -243
-243 ÷ 644 = -0.37732919254658387
-0.37732919254658387 x 100 = -37.73%