-60.69% is the change from 664 to 261
Calculation steps:
[( 261 - 664 ) ÷ 664] x 100 = -60.69%
Formula
Percentage change = [(261 - 664) / 664] x 100
Subtract the new number by the original number
261 - 664 = -403
-403 ÷ 664 = -0.6069277108433735
-0.6069277108433735 x 100 = -60.69%