-62.1% is the change from 657 to 249
Calculation steps:
[( 249 - 657 ) ÷ 657] x 100 = -62.1%
Formula
Percentage change = [(249 - 657) / 657] x 100
Subtract the new number by the original number
249 - 657 = -408
-408 ÷ 657 = -0.6210045662100456
-0.6210045662100456 x 100 = -62.1%