-61.82% is the change from 660 to 252
Calculation steps:
[( 252 - 660 ) ÷ 660] x 100 = -61.82%
Formula
Percentage change = [(252 - 660) / 660] x 100
Subtract the new number by the original number
252 - 660 = -408
-408 ÷ 660 = -0.6181818181818182
-0.6181818181818182 x 100 = -61.82%