-64.29% is the change from 644 to 230
Calculation steps:
[( 230 - 644 ) ÷ 644] x 100 = -64.29%
Formula
Percentage change = [(230 - 644) / 644] x 100
Subtract the new number by the original number
230 - 644 = -414
-414 ÷ 644 = -0.6428571428571429
-0.6428571428571429 x 100 = -64.29%