-63.4% is the change from 664 to 243
Calculation steps:
[( 243 - 664 ) ÷ 664] x 100 = -63.4%
Formula
Percentage change = [(243 - 664) / 664] x 100
Subtract the new number by the original number
243 - 664 = -421
-421 ÷ 664 = -0.6340361445783133
-0.6340361445783133 x 100 = -63.4%