-70.03% is the change from 664 to 199
Calculation steps:
[( 199 - 664 ) ÷ 664] x 100 = -70.03%
Formula
Percentage change = [(199 - 664) / 664] x 100
Subtract the new number by the original number
199 - 664 = -465
-465 ÷ 664 = -0.7003012048192772
-0.7003012048192772 x 100 = -70.03%