-25.15% is the change from 688 to 515
Calculation steps:
[( 515 - 688 ) ÷ 688] x 100 = -25.15%
Formula
Percentage change = [(515 - 688) / 688] x 100
Subtract the new number by the original number
515 - 688 = -173
-173 ÷ 688 = -0.251453488372093
-0.251453488372093 x 100 = -25.15%