-63.52% is the change from 688 to 251
Calculation steps:
[( 251 - 688 ) ÷ 688] x 100 = -63.52%
Formula
Percentage change = [(251 - 688) / 688] x 100
Subtract the new number by the original number
251 - 688 = -437
-437 ÷ 688 = -0.6351744186046512
-0.6351744186046512 x 100 = -63.52%