-20.63% is the change from 664 to 527
Calculation steps:
[( 527 - 664 ) ÷ 664] x 100 = -20.63%
Formula
Percentage change = [(527 - 664) / 664] x 100
Subtract the new number by the original number
527 - 664 = -137
-137 ÷ 664 = -0.2063253012048193
-0.2063253012048193 x 100 = -20.63%