-10.83% is the change from 840 to 749
Calculation steps:
[( 749 - 840 ) ÷ 840] x 100 = -10.83%
Formula
Percentage change = [(749 - 840) / 840] x 100
Subtract the new number by the original number
749 - 840 = -91
-91 ÷ 840 = -0.10833333333333334
-0.10833333333333334 x 100 = -10.83%