-59.3% is the change from 688 to 280
Calculation steps:
[( 280 - 688 ) ÷ 688] x 100 = -59.3%
Formula
Percentage change = [(280 - 688) / 688] x 100
Subtract the new number by the original number
280 - 688 = -408
-408 ÷ 688 = -0.5930232558139535
-0.5930232558139535 x 100 = -59.3%