-62.2% is the change from 664 to 251
Calculation steps:
[( 251 - 664 ) ÷ 664] x 100 = -62.2%
Formula
Percentage change = [(251 - 664) / 664] x 100
Subtract the new number by the original number
251 - 664 = -413
-413 ÷ 664 = -0.6219879518072289
-0.6219879518072289 x 100 = -62.2%