-62.31% is the change from 666 to 251
Calculation steps:
[( 251 - 666 ) ÷ 666] x 100 = -62.31%
Formula
Percentage change = [(251 - 666) / 666] x 100
Subtract the new number by the original number
251 - 666 = -415
-415 ÷ 666 = -0.6231231231231231
-0.6231231231231231 x 100 = -62.31%