-54.8% is the change from 688 to 311
Calculation steps:
[( 311 - 688 ) ÷ 688] x 100 = -54.8%
Formula
Percentage change = [(311 - 688) / 688] x 100
Subtract the new number by the original number
311 - 688 = -377
-377 ÷ 688 = -0.5479651162790697
-0.5479651162790697 x 100 = -54.8%