-69.1% is the change from 644 to 199
Calculation steps:
[( 199 - 644 ) ÷ 644] x 100 = -69.1%
Formula
Percentage change = [(199 - 644) / 644] x 100
Subtract the new number by the original number
199 - 644 = -445
-445 ÷ 644 = -0.6909937888198758
-0.6909937888198758 x 100 = -69.1%