-20.35% is the change from 688 to 548
Calculation steps:
[( 548 - 688 ) ÷ 688] x 100 = -20.35%
Formula
Percentage change = [(548 - 688) / 688] x 100
Subtract the new number by the original number
548 - 688 = -140
-140 ÷ 688 = -0.20348837209302326
-0.20348837209302326 x 100 = -20.35%