-62.72% is the change from 668 to 249
Calculation steps:
[( 249 - 668 ) ÷ 668] x 100 = -62.72%
Formula
Percentage change = [(249 - 668) / 668] x 100
Subtract the new number by the original number
249 - 668 = -419
-419 ÷ 668 = -0.6272455089820359
-0.6272455089820359 x 100 = -62.72%