-65.37% is the change from 644 to 223
Calculation steps:
[( 223 - 644 ) ÷ 644] x 100 = -65.37%
Formula
Percentage change = [(223 - 644) / 644] x 100
Subtract the new number by the original number
223 - 644 = -421
-421 ÷ 644 = -0.6537267080745341
-0.6537267080745341 x 100 = -65.37%