-62.78% is the change from 669 to 249
Calculation steps:
[( 249 - 669 ) ÷ 669] x 100 = -62.78%
Formula
Percentage change = [(249 - 669) / 669] x 100
Subtract the new number by the original number
249 - 669 = -420
-420 ÷ 669 = -0.6278026905829597
-0.6278026905829597 x 100 = -62.78%