-26.09% is the change from 920 to 680
Calculation steps:
[( 680 - 920 ) ÷ 920] x 100 = -26.09%
Formula
Percentage change = [(680 - 920) / 920] x 100
Subtract the new number by the original number
680 - 920 = -240
-240 ÷ 920 = -0.2608695652173913
-0.2608695652173913 x 100 = -26.09%