-62.5% is the change from 688 to 258
Calculation steps:
[( 258 - 688 ) ÷ 688] x 100 = -62.5%
Formula
Percentage change = [(258 - 688) / 688] x 100
Subtract the new number by the original number
258 - 688 = -430
-430 ÷ 688 = -0.625
-0.625 x 100 = -62.5%