-61.33% is the change from 649 to 251
Calculation steps:
[( 251 - 649 ) ÷ 649] x 100 = -61.33%
Formula
Percentage change = [(251 - 649) / 649] x 100
Subtract the new number by the original number
251 - 649 = -398
-398 ÷ 649 = -0.613251155624037
-0.613251155624037 x 100 = -61.33%