-26.31% is the change from 688 to 507
Calculation steps:
[( 507 - 688 ) ÷ 688] x 100 = -26.31%
Formula
Percentage change = [(507 - 688) / 688] x 100
Subtract the new number by the original number
507 - 688 = -181
-181 ÷ 688 = -0.26308139534883723
-0.26308139534883723 x 100 = -26.31%