-62.27% is the change from 660 to 249
Calculation steps:
[( 249 - 660 ) ÷ 660] x 100 = -62.27%
Formula
Percentage change = [(249 - 660) / 660] x 100
Subtract the new number by the original number
249 - 660 = -411
-411 ÷ 660 = -0.6227272727272727
-0.6227272727272727 x 100 = -62.27%