-19.88% is the change from 664 to 532
Calculation steps:
[( 532 - 664 ) ÷ 664] x 100 = -19.88%
Formula
Percentage change = [(532 - 664) / 664] x 100
Subtract the new number by the original number
532 - 664 = -132
-132 ÷ 664 = -0.19879518072289157
-0.19879518072289157 x 100 = -19.88%