-62.46% is the change from 666 to 250
Calculation steps:
[( 250 - 666 ) ÷ 666] x 100 = -62.46%
Formula
Percentage change = [(250 - 666) / 666] x 100
Subtract the new number by the original number
250 - 666 = -416
-416 ÷ 666 = -0.6246246246246246
-0.6246246246246246 x 100 = -62.46%